rockchip: px30: move secure init to separate file

Similar to others like rk3399 and rk3288 move the secure init to a
separate file to unclutter the soc init a bit.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Change-Id: Iebb38e24f1c7fe5353f139c896fb8ca769bf9691
diff --git a/plat/rockchip/px30/platform.mk b/plat/rockchip/px30/platform.mk
index ee85cd3..d1299d4 100644
--- a/plat/rockchip/px30/platform.mk
+++ b/plat/rockchip/px30/platform.mk
@@ -20,6 +20,7 @@
 				-I${RK_PLAT_COMMON}/pmusram			\
 				-I${RK_PLAT_SOC}/				\
 				-I${RK_PLAT_SOC}/drivers/pmu/			\
+				-I${RK_PLAT_SOC}/drivers/secure/		\
 				-I${RK_PLAT_SOC}/drivers/soc/			\
 				-I${RK_PLAT_SOC}/include/
 
@@ -52,6 +53,7 @@
 				${RK_PLAT_COMMON}/plat_topology.c		\
 				${RK_PLAT_COMMON}/rockchip_sip_svc.c		\
 				${RK_PLAT_SOC}/drivers/pmu/pmu.c		\
+				${RK_PLAT_SOC}/drivers/secure/secure.c		\
 				${RK_PLAT_SOC}/drivers/soc/soc.c		\
 				${RK_PLAT_SOC}/plat_sip_calls.c