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/rk3368/platform.mk b/plat/rockchip/rk3368/platform.mk
index 7837af9..f6960cf 100644
--- a/plat/rockchip/rk3368/platform.mk
+++ b/plat/rockchip/rk3368/platform.mk
@@ -39,7 +39,6 @@
 				${RK_PLAT_COMMON}/bl31_plat_setup.c		\
 				${RK_PLAT_COMMON}/params_setup.c                \
 				${RK_PLAT_COMMON}/pmusram/pmu_sram_cpus_on.S		\
-				${RK_PLAT_COMMON}/pmusram/pmu_sram.c		\
 				${RK_PLAT_COMMON}/plat_pm.c			\
 				${RK_PLAT_COMMON}/plat_topology.c		\
 				${RK_PLAT_COMMON}/aarch64/platform_common.c	\
@@ -50,3 +49,5 @@
 				${RK_PLAT_SOC}/drivers/ddr/ddr_rk3368.c		\
 
 ENABLE_PLAT_COMPAT	:=      0
+
+$(eval $(call add_define,PLAT_EXTRA_LD_SCRIPT))