sunxi: Groundwork to support new dram type for A83T

Different A83T boards have different DRAM types. Banapi M3 has LPDDR3,
Allwinner Homlet v1.2 has DDR3.

This adds groundwork to support for new DRAM type for A83T.

Introduce CONFIG_DRAM_TYPE, It'll be 3 for DDR3 and 7 for LPDDR3, must
be set in respective board defconfig.

Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index 8a30d08..a334aa3 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -95,6 +95,12 @@
 	bool
 	default y if MACH_SUN8I_A23 || MACH_SUN8I_A33 || MACH_SUN8I_H3 || MACH_SUN8I_A83T
 
+config DRAM_TYPE
+	int "sunxi dram type"
+	depends on MACH_SUN8I_A83T
+	default 3
+	---help---
+	Set the dram type, 3: DDR3, 7: LPDDR3
 
 config DRAM_CLK
 	int "sunxi dram clock speed"