rockchip: move pmusram assembler code to a aarch64 subdir

The current code doing power-management from sram is highly
arm64-specific so should live in a corresponding subdirectory
and not in the common area.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Change-Id: I3b79ac26f70fd189d4d930faa6251439a644c5d9
diff --git a/plat/rockchip/rk3399/platform.mk b/plat/rockchip/rk3399/platform.mk
index 1013598..3dfafc9 100644
--- a/plat/rockchip/rk3399/platform.mk
+++ b/plat/rockchip/rk3399/platform.mk
@@ -12,7 +12,7 @@
 
 PLAT_INCLUDES		:=	-I${RK_PLAT_COMMON}/			\
 				-I${RK_PLAT_COMMON}/include/		\
-				-I${RK_PLAT_COMMON}/pmusram		\
+				-I${RK_PLAT_COMMON}/aarch64/		\
 				-I${RK_PLAT_COMMON}/drivers/pmu/	\
 				-I${RK_PLAT_SOC}/			\
 				-I${RK_PLAT_SOC}/drivers/pmu/		\
@@ -49,7 +49,7 @@
 			${RK_PLAT_COMMON}/aarch64/plat_helpers.S	\
 			${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}/aarch64/pmu_sram_cpus_on.S	\
 			${RK_PLAT_COMMON}/plat_pm.c			\
 			${RK_PLAT_COMMON}/plat_topology.c		\
 			${RK_PLAT_COMMON}/aarch64/platform_common.c	\