rockchip/rk3399: Move DRAM restore to PMUSRAM

This moves the DRAM restore code to PMUSRAM. This is so that the
voltage domain that contains the SRAM that it was stored in before may
be turned off during system suspend.

Change-Id: Id761181a30caadd12f1ce061d1034f3159a76d28
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
diff --git a/plat/rockchip/rk3399/drivers/dram/dram.c b/plat/rockchip/rk3399/drivers/dram/dram.c
index fbf3110..ad79f9e 100644
--- a/plat/rockchip/rk3399/drivers/dram/dram.c
+++ b/plat/rockchip/rk3399/drivers/dram/dram.c
@@ -10,7 +10,7 @@
 #include <soc.h>
 #include <rk3399_def.h>
 
-__sramdata struct rk3399_sdram_params sdram_config;
+__pmusramdata struct rk3399_sdram_params sdram_config;
 
 void dram_init(void)
 {