rockchip: add pmusram section

the function pmu_cpuon_entrypoint() need to run in the pmusram,
we just copy bin file to pmusram before, now we add pmusram section
and link pmu_cpuon_entrypoint() to pmusram directly

Change-Id: Iae31e4c01c480c8e6f565a8f588332b478efdb16
Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
diff --git a/plat/rockchip/rk3399/include/platform_def.h b/plat/rockchip/rk3399/include/platform_def.h
index f4427d0..4937229 100644
--- a/plat/rockchip/rk3399/include/platform_def.h
+++ b/plat/rockchip/rk3399/include/platform_def.h
@@ -107,4 +107,5 @@
 
 #define PLAT_RK_PRIMARY_CPU		0x0
 
+#define PSRAM_DO_DDR_RESUME	1
 #endif /* __PLATFORM_DEF_H__ */