sunxi: Add DRAM_SUN9I kconfig entry

Add proper and simple kconfig option for dram_sun9i.c
instead of using MACH type on Makefile.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

arch/arm/mach-sunxi/Kconfig

@@ -18,6 +18,12 @@ config DRAM_SUN6I
 	  Select this dram controller driver for Sun6i platforms,
 	  like A31/A31s.
 
+config DRAM_SUN9I
+	bool
+	help
+	  Select this dram controller driver for Sun9i platforms,
+	  like A80.
+
 config SUN6I_P2WI
 	bool "Allwinner sun6i internal P2WI controller"
 	help
@@ -215,6 +221,7 @@ config MACH_SUN8I_V3S
 config MACH_SUN9I
 	bool "sun9i (Allwinner A80)"
 	select CPU_V7
+	select DRAM_SUN9I
 	select SUN6I_PRCM
 	select SUNXI_HIGH_SRAM
 	select SUNXI_GEN_SUN6I

arch/arm/mach-sunxi/Makefile

@@ -35,11 +35,11 @@ obj-$(CONFIG_MACH_SUN9I)	+= clock_sun9i.o gtbus_sun9i.o
 ifdef CONFIG_SPL_BUILD
 obj-$(CONFIG_DRAM_SUN4I)	+= dram_sun4i.o
 obj-$(CONFIG_DRAM_SUN6I)	+= dram_sun6i.o
+obj-$(CONFIG_DRAM_SUN9I)	+= dram_sun9i.o
 obj-$(CONFIG_MACH_SUN8I_A23)	+= dram_sun8i_a23.o
 obj-$(CONFIG_MACH_SUN8I_A33)	+= dram_sun8i_a33.o
 obj-$(CONFIG_MACH_SUN8I_A83T)	+= dram_sun8i_a83t.o
 obj-$(CONFIG_SPL_SPI_SUNXI)	+= spl_spi_sunxi.o
 obj-$(CONFIG_SUNXI_DRAM_DW)	+= dram_sunxi_dw.o
 obj-$(CONFIG_SUNXI_DRAM_DW)	+= dram_timings/
-obj-$(CONFIG_MACH_SUN9I)	+= dram_sun9i.o
 endif