amlogic: Move efuse code to common directory

The efuse code is the same between GXL and GXBB. Move the code to common
directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Ie37f21d1907a36292724f1fb645a78041fe4a6b3
diff --git a/plat/amlogic/gxbb/platform.mk b/plat/amlogic/gxbb/platform.mk
index 2430f23..d2d337c 100644
--- a/plat/amlogic/gxbb/platform.mk
+++ b/plat/amlogic/gxbb/platform.mk
@@ -28,7 +28,7 @@
 				plat/common/plat_psci_common.c		\
 				${AML_PLAT_COMMON}/aarch64/aml_helpers.S	\
 				${AML_PLAT_SOC}/gxbb_bl31_setup.c	\
-				${AML_PLAT_SOC}/gxbb_efuse.c		\
+				${AML_PLAT_COMMON}/aml_efuse.c		\
 				${AML_PLAT_SOC}/gxbb_mhu.c		\
 				${AML_PLAT_SOC}/gxbb_pm.c		\
 				${AML_PLAT_COMMON}/aml_scpi.c		\