[ramdisk] add cvitek pre-built ramdisk

Change-Id: Ic7d2046a23358129eaf621b5558984a64fa7361d

ramdisk/initramfs/glibc_riscv64/usr/include/linux/atmppp.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* atmppp.h - RFC2364 PPPoATM */
+
+/* Written 2000 by Mitchell Blank Jr */
+
+#ifndef _LINUX_ATMPPP_H
+#define _LINUX_ATMPPP_H
+
+#include <linux/atm.h>
+
+#define PPPOATM_ENCAPS_AUTODETECT	(0)
+#define PPPOATM_ENCAPS_VC		(1)
+#define PPPOATM_ENCAPS_LLC		(2)
+
+/*
+ * This is for the ATM_SETBACKEND call - these are like socket families:
+ * the first element of the structure is the backend number and the rest
+ * is per-backend specific
+ */
+struct atm_backend_ppp {
+	atm_backend_t	backend_num;	/* ATM_BACKEND_PPP */
+	int		encaps;		/* PPPOATM_ENCAPS_* */
+};
+
+#endif	/* _LINUX_ATMPPP_H */