[linux] porting cvitek asic chips.

1. update cv182x/cv183x configuration file
	2. update cv181x/cv180x configuration file
	3. update clk driver for cvitek
	4. update dma driver for cvitek
	5. update soc driver for cvitek
	6. porting cvitek ion driver from kernel-4.19
	7. compatible with riscv

Change-Id: Icff9fafe0ebe7d6bab824bbadb952e08bdc66c19

linux_5.10/Kconfiglib/examples/dumpvars.py

@@ -0,0 +1,15 @@
+# Prints all (set) environment variables referenced in the Kconfig files
+# together with their values, as a list of assignments.
+#
+# Note: This only works for environment variables referenced via the $(FOO)
+# preprocessor syntax. The older $FOO syntax is maintained for backwards
+# compatibility.
+
+import os
+import sys
+
+import kconfiglib
+
+
+print(" ".join("{}='{}'".format(var, os.environ[var])
+               for var in kconfiglib.Kconfig(sys.argv[1]).env_vars))