sunxi: add support for Allwinner H6 SoC

Allwinner H6 is a new SoC from Allwinner features USB3 and PCIe
interfaces.

This patch adds support for it.

The corresponding DTSI file, from Linux next-20180720, is also
introduced.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 2af26a8..0be8ff0 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -256,7 +256,7 @@
 config SPL_FIT_IMAGE_TINY
 	bool "Remove functionality from SPL FIT loading to reduce size"
 	depends on SPL_FIT
-	default y if MACH_SUN50I || MACH_SUN50I_H5
+	default y if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN50I_H6
 	help
 	  Enable this to reduce the size of the FIT image loading code
 	  in SPL, if space for the SPL binary is very tight.