ram: unify obj-$(CONFIG_RAM) and obj-$(CONFIG_SPL_RAM) entries

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/Makefile

 obj-$(CONFIG_$(SPL_)DM)		+= core/
 obj-$(CONFIG_$(SPL_)CLK)	+= clk/
+obj-$(CONFIG_$(SPL_)RAM)	+= ram/
 
 ifdef CONFIG_SPL_BUILD
 
@@ -24,7 +25,6 @@ obj-$(CONFIG_SPL_DMA_SUPPORT) += dma/
 obj-$(CONFIG_SPL_ETH_SUPPORT) += net/
 obj-$(CONFIG_SPL_ETH_SUPPORT) += net/phy/
 obj-$(CONFIG_SPL_USBETH_SUPPORT) += net/phy/
-obj-$(CONFIG_SPL_RAM) += ram/
 obj-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += usb/musb-new/
 obj-$(CONFIG_SPL_USBETH_SUPPORT) += usb/gadget/
 obj-$(CONFIG_SPL_WATCHDOG_SUPPORT) += watchdog/
@@ -46,7 +46,6 @@ obj-$(CONFIG_LED) += led/
 obj-y += misc/
 obj-y += pcmcia/
 obj-y += dfu/
-obj-$(CONFIG_RAM) += ram/
 obj-y += rtc/
 obj-y += sound/
 obj-y += tpm/