ARM: meson: Add support for AXG family

This patch adds support for the Amlogic AXG SoC, which is very close from
the Amlogic GXL SoCs with :
- Same 4xCortex-A53 CPUs but clocked at 1.2GHZ max
- DDR Interface limited to DDR4 16bit
- The whole physical register address space has been moved to 0xfxxxxxxx
- The pinctrl setup has changed
- The clock tree is different enough to use a different driver

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/mach-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index 6225417..7f217fa 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -6,6 +6,8 @@
 	select CLK
 	select DM
 	select DM_SERIAL
+	select SYSCON
+	select REGMAP
 	imply CMD_DM
 
 config MESON_GX
@@ -34,6 +36,12 @@
 	help
 	  Select this if your SoC is an S912
 
+config MESON_AXG
+	bool "AXG"
+	select MESON64_COMMON
+	help
+		Select this if your SoC is an A113X/D
+
 endchoice
 
 config SYS_SOC