gcc: fix compile for cortex-a7

toolchain/gcc/Makefile

@@ -26,6 +26,10 @@ ifeq ($(ADK_TARGET_ARCH_ARM),y)
 TARGET_CFLAGS:=		$(filter-out -mcpu=cortex-a9,$(TARGET_CFLAGS))
 TARGET_CXXFLAGS:=	$(filter-out -mcpu=cortex-a9,$(TARGET_CXXFLAGS))
 endif
+ifeq ($(ADK_TARGET_ARCH_ARM),y)
+TARGET_CFLAGS:=		$(filter-out -mcpu=cortex-a7,$(TARGET_CFLAGS))
+TARGET_CXXFLAGS:=	$(filter-out -mcpu=cortex-a7,$(TARGET_CXXFLAGS))
+endif
 
 ifeq ($(ADK_TARGET_USE_STATIC_AND_SHARED_LIBS),y)
 TARGET_CFLAGS:=		$(filter-out -static,$(TARGET_CFLAGS))