Don't use -Wl,--fix-cortex-a8 for Cortex A7, A9, A15, Krait or Denver

-Wl,--fix-cortex-a8 is a workaround for an Erratum in Cortex-A8
processors. It slightly increases code size and decreases performance,
and there's no point in using it on non-A8 CPUs.

Instead of forcing it unconditionally, use it when targeting
Cortex-A8 or generic armv7-a (which might or might not be A8).

Change-Id: Ifa59765d380445237edccfe5440a67b3ba1e459a
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>

core/combo/arch/arm/armv7-a-neon.mk

@@ -16,14 +16,23 @@ ifneq (,$(filter cortex-a15 krait denver,$(TARGET_$(combo_2nd_arch_prefix)CPU_VA
 	# Fake an ARM compiler flag as these processors support LPAE which GCC/clang
 	# don't advertise.
 	arch_variant_cflags += -D__ARM_FEATURE_LPAE=1
+	arch_variant_ldflags := \
+		-Wl,--no-fix-cortex-a8
 else
 ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)),cortex-a8)
 	arch_variant_cflags := -mcpu=cortex-a8
+	arch_variant_ldflags := \
+		-Wl,--fix-cortex-a8
 else
 ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)),cortex-a7)
 	arch_variant_cflags := -mcpu=cortex-a7
+	arch_variant_ldflags := \
+		-Wl,--no-fix-cortex-a8
 else
 	arch_variant_cflags := -march=armv7-a
+	# Generic ARM might be a Cortex A8 -- better safe than sorry
+	arch_variant_ldflags := \
+		-Wl,--fix-cortex-a8
 endif
 endif
 endif
@@ -31,6 +40,3 @@ endif
 arch_variant_cflags += \
     -mfloat-abi=softfp \
     -mfpu=neon
-
-arch_variant_ldflags := \
-	-Wl,--fix-cortex-a8