arm: add initial support for Amlogic P212 based on Meson GXL family

This adds platform code for the Amlogic P212 reference board based on a
Meson GXL (S905X) SoC with the Meson GXL configuration.

This initial submission only supports UART and MMC/SDCard, support for the
internal Ethernet PHY in Work In Progress.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Beniamino Galvani <b.galvani@gmail.com>
diff --git a/board/amlogic/p212/Kconfig b/board/amlogic/p212/Kconfig
new file mode 100644
index 0000000..720c92b
--- /dev/null
+++ b/board/amlogic/p212/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_P212
+
+config SYS_BOARD
+	default "p212"
+
+config SYS_VENDOR
+	default "amlogic"
+
+config SYS_CONFIG_NAME
+	default "p212"
+
+endif