amlogic: Move topology file to common directory

As done already for multiple files, move the topology file to the common
directory.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Iaca357a089593ad58c35c05c929239132249dcda
diff --git a/plat/amlogic/gxl/platform.mk b/plat/amlogic/gxl/platform.mk
index 11687b5..1c41cd5 100644
--- a/plat/amlogic/gxl/platform.mk
+++ b/plat/amlogic/gxl/platform.mk
@@ -24,7 +24,7 @@
 
 PLAT_BL_COMMON_SOURCES	:=	drivers/amlogic/console/aarch64/meson_console.S	\
 				${AML_PLAT_SOC}/gxl_common.c		\
-				${AML_PLAT_SOC}/gxl_topology.c		\
+				${AML_PLAT_COMMON}/aml_topology.c	\
 				${XLAT_TABLES_LIB_SRCS}
 
 BL31_SOURCES		+=	lib/cpus/aarch64/cortex_a53.S		\