sun8i: Add dram initialization support

Based on the register / dram_para headers from the Allwinner u-boot / linux
sources + the init sequences from boot0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 9b3e80c..bc98c56 100644
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -114,7 +114,8 @@
 /* do some early init */
 void s_init(void)
 {
-#if defined CONFIG_SPL_BUILD && defined CONFIG_MACH_SUN6I
+#if defined CONFIG_SPL_BUILD && \
+		(defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I)
 	/* Magic (undocmented) value taken from boot0, without this DRAM
 	 * access gets messed up (seems cache related) */
 	setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800);