PSCI: Migrate ARM reference platforms to new platform API

This patch migrates ARM reference platforms, Juno and FVP, to the new platform
API mandated by the new PSCI power domain topology and composite power state
frameworks. The platform specific makefiles now exports the build flag
ENABLE_PLAT_COMPAT=0 to disable the platform compatibility layer.

Change-Id: I3040ed7cce446fc66facaee9c67cb54a8cd7ca29
diff --git a/plat/arm/board/juno/platform.mk b/plat/arm/board/juno/platform.mk
index 98834e7..b80cfb3 100644
--- a/plat/arm/board/juno/platform.mk
+++ b/plat/arm/board/juno/platform.mk
@@ -48,6 +48,9 @@
 # power down sequence
 SKIP_A57_L1_FLUSH_PWR_DWN	:=	 1
 
+# Disable the PSCI platform compatibility layer
+ENABLE_PLAT_COMPAT	:= 	0
+
 include plat/arm/board/common/board_css.mk
 include plat/arm/common/arm_common.mk
 include plat/arm/soc/common/soc_css.mk