amlogic: Move SCPI code to common directory

The SCPI code is the same between GXBB and GXL. No need to have it
replicated for each SoCs. Move it to the common directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: I7e416caf1e9538b3ce7702c0363ee00a054e2451
diff --git a/plat/amlogic/gxl/platform.mk b/plat/amlogic/gxl/platform.mk
index a7cda77..f239482 100644
--- a/plat/amlogic/gxl/platform.mk
+++ b/plat/amlogic/gxl/platform.mk
@@ -14,7 +14,8 @@
 DOIMAGETOOL		?=	${DOIMAGEPATH}/doimage
 
 PLAT_INCLUDES		:=	-Iinclude/drivers/amlogic/		\
-				-I${AML_PLAT_SOC}/include
+				-I${AML_PLAT_SOC}/include		\
+				-I${AML_PLAT_COMMON}/include
 
 GIC_SOURCES		:=	drivers/arm/gic/common/gic_common.c	\
 				drivers/arm/gic/v2/gicv2_main.c		\
@@ -33,7 +34,7 @@
 				${AML_PLAT_SOC}/gxl_efuse.c		\
 				${AML_PLAT_SOC}/gxl_mhu.c		\
 				${AML_PLAT_SOC}/gxl_pm.c		\
-				${AML_PLAT_SOC}/gxl_scpi.c		\
+				${AML_PLAT_COMMON}/aml_scpi.c		\
 				${AML_PLAT_SOC}/gxl_sip_svc.c		\
 				${AML_PLAT_SOC}/gxl_thermal.c		\
 				drivers/amlogic/crypto/sha_dma.c	\