mips: jz47xx: Add JZ4780 SoC support

Add initial support for the Ingenic JZ47xx MIPS SoC.

Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/arch/mips/mach-jz47xx/jz4780/TODO b/arch/mips/mach-jz47xx/jz4780/TODO
new file mode 100644
index 0000000..99ad622
--- /dev/null
+++ b/arch/mips/mach-jz47xx/jz4780/TODO
@@ -0,0 +1,4 @@
+- dm gpio driver
+- ethernet driver for the dm9000
+- reduce the hundreds of definitions of register addresses to the ones really needed in assembly or SPL.
+- define the remaining register base addresses as physical addresses and establish a mapping with ioremap_nocache()