device/rockchip: add the 32bit support for rk3326 and px30

if you need build the 32bit by default, you need modify the xml on
.repo/manifests.
for example, the px30:
.repo/manifests$
--- a/px30_linux.xml
+++ b/px30_linux.xml
@@ -17,7 +17,7 @@
     <linkfile dest="mkfirmware.sh" src="common/mkfirmware.sh"/>
     <linkfile dest="build.sh" src="common/build.sh"/>
     <linkfile dest="rkflash.sh" src="common/rkflash.sh"/>
-    <linkfile dest="device/rockchip/.BoardConfig.mk" src="px30/BoardConfig.mk"/>
+    <linkfile dest="device/rockchip/.BoardConfig.mk" src="px30/BoardConfig_32bit.mk"/>
   </project>

Then run the build.sh

Change-Id: I86500f054d51bf185129dfa53fe9309252dcb6fb
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

px30/BoardConfig.mk

@@ -13,7 +13,7 @@ export RK_BOOT_IMG=boot.img
 # parameter for GPT table
 export RK_PARAMETER=parameter-buildroot.txt
 # Buildroot config
-export RK_CFG_BUILDROOT=rockchip_px30
+export RK_CFG_BUILDROOT=rockchip_px30_64
 # Recovery config
 export RK_CFG_RECOVERY=rockchip_px30_recovery
 # Pcba config

px30/BoardConfig_32bit.mk

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Target arch
+export RK_ARCH=arm64
+# Uboot defconfig
+export RK_UBOOT_DEFCONFIG=evb-px30
+# Kernel defconfig
+export RK_KERNEL_DEFCONFIG=px30_linux_defconfig
+# Kernel dts
+export RK_KERNEL_DTS=px30-evb-ddr3-v10-linux
+# boot image type
+export RK_BOOT_IMG=boot.img
+# parameter for GPT table
+export RK_PARAMETER=parameter-buildroot.txt
+# Buildroot config
+export RK_CFG_BUILDROOT=rockchip_px30_32
+# Recovery config
+export RK_CFG_RECOVERY=rockchip_px30_recovery
+# Pcba config
+export RK_CFG_PCBA=rockchip_px30_pcba
+# Build jobs
+export RK_JOBS=12
+# target chip
+export RK_TARGET_PRODUCT=px30
+# Set rootfs type, including ext2 ext4 squashfs
+export RK_ROOTFS_TYPE=ext4
+# rootfs image path
+export RK_ROOTFS_IMG=buildroot/output/$RK_CFG_BUILDROOT/images/rootfs.$RK_ROOTFS_TYPE
+# Set oem partition type, including ext2 squashfs
+export RK_OEM_FS_TYPE=ext2
+# Set userdata partition type, including ext2, fat
+export RK_USERDATA_FS_TYPE=ext2
+# Set flash type. support <emmc, nand, spi_nand, spi_nor>
+export RK_STORAGE_TYPE=emmc
+#OEM config: /oem/dueros/aispeech/iflytekSDK/CaeDemo_VAD/smart_voice
+export RK_OEM_DIR=oem_normal
+#userdata config
+export RK_USERDATA_DIR=userdata_normal

rk3326/BoardConfig.mk

@@ -13,7 +13,7 @@ export RK_BOOT_IMG=boot.img
 # parameter for GPT table
 export RK_PARAMETER=parameter-buildroot.txt
 # Buildroot config
-export RK_CFG_BUILDROOT=rockchip_rk3326
+export RK_CFG_BUILDROOT=rockchip_rk3326_64
 # Recovery config
 export RK_CFG_RECOVERY=rockchip_rk3326_recovery
 # Pcba config

rk3326/BoardConfig_32bit.mk

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Target arch
+export RK_ARCH=arm64
+# Uboot defconfig
+export RK_UBOOT_DEFCONFIG=evb-rk3326
+# Kernel defconfig
+export RK_KERNEL_DEFCONFIG=rk3326_linux_defconfig
+# Kernel dts
+export RK_KERNEL_DTS=rk3326-evb-lp3-v10-linux
+# boot image type
+export RK_BOOT_IMG=boot.img
+# parameter for GPT table
+export RK_PARAMETER=parameter-buildroot.txt
+# Buildroot config
+export RK_CFG_BUILDROOT=rockchip_rk3326_32
+# Recovery config
+export RK_CFG_RECOVERY=rockchip_rk3326_recovery
+# Pcba config
+export RK_CFG_PCBA=rockchip_rk3326_pcba
+# Build jobs
+export RK_JOBS=12
+# target chip
+export RK_TARGET_PRODUCT=rk3326
+# Set rootfs type, including ext2 ext4 squashfs
+export RK_ROOTFS_TYPE=ext4
+# rootfs image path
+export RK_ROOTFS_IMG=buildroot/output/$RK_CFG_BUILDROOT/images/rootfs.$RK_ROOTFS_TYPE
+# Set oem partition type, including ext2 squashfs
+export RK_OEM_FS_TYPE=ext2
+# Set userdata partition type, including ext2, fat
+export RK_USERDATA_FS_TYPE=ext2
+# Set flash type. support <emmc, nand, spi_nand, spi_nor>
+export RK_STORAGE_TYPE=emmc
+#OEM config: /oem/dueros/aispeech/iflytekSDK/CaeDemo_VAD/smart_voice
+export RK_OEM_DIR=oem_normal
+#userdata config
+export RK_USERDATA_DIR=userdata_normal