ram: rockchip: Add rk3588 ddr driver support

Add ddr driver for rk3588 to get the ram capacity.

Co-developed-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
index 98839ad..36dc050 100644
--- a/drivers/ram/rockchip/Makefile
+++ b/drivers/ram/rockchip/Makefile
@@ -14,5 +14,6 @@
 obj-$(CONFIG_ROCKCHIP_RK3328) = sdram_rk3328.o sdram_pctl_px30.o sdram_phy_px30.o
 obj-$(CONFIG_ROCKCHIP_RK3399) += sdram_rk3399.o
 obj-$(CONFIG_ROCKCHIP_RK3568) += sdram_rk3568.o
+obj-$(CONFIG_ROCKCHIP_RK3588) += sdram_rk3588.o
 obj-$(CONFIG_ROCKCHIP_RV1126) += sdram_rv1126.o sdram_pctl_px30.o
 obj-$(CONFIG_ROCKCHIP_SDRAM_COMMON) += sdram_common.o