ARM: sunxi: Add basic A31 support

Add a new sun6i machine that supports UART and MMC.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens@csie.org: use SPDX labels, adapt to Kconfig system, drop ifdef
		around mmc and smp code, drop MACH_TYPE]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index bcd0a55..05defac 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -12,6 +12,14 @@
 
 endif
 
+if TARGET_SUN6I
+
+config SYS_CONFIG_NAME
+	string
+	default "sun6i"
+
+endif
+
 if TARGET_SUN7I
 
 config SYS_CONFIG_NAME
@@ -19,7 +27,7 @@
 
 endif
 
-if TARGET_SUN4I || TARGET_SUN5I || TARGET_SUN7I
+if TARGET_SUN4I || TARGET_SUN5I || TARGET_SUN6I || TARGET_SUN7I
 
 config SYS_CPU
 	default "armv7"