[MIPS] Disabled madd support for Ingenic Xburst CPUs.

1. Added xburst ARCH_VARIANT file 'mips32r2-fp-xburst.mk'.
   a) Added -mno-fused-madd GCC option.

2. Removing -mno-fused-madd GCC option for LLVM.


Change-Id: I947a74eb89c05ae321417533c3c40241abc6f965
Signed-off-by: Pete Delaney <piet.delaney@imgtec.com>

core/combo/arch/mips/mips32r2-fp-xburst.mk

@@ -0,0 +1,17 @@
+# Configuration for Android on Ingenic xb4780/Xburst MIPS CPU.
+# Generating binaries for MIPS32R2/hard-float/little-endian without
+# support for the Madd family of instructions.
+
+ARCH_MIPS_HAS_FPU :=true
+ARCH_HAVE_ALIGNED_DOUBLES :=true
+arch_variant_cflags := \
+    -EL \
+    -march=mips32r2 \
+    -mtune=mips32r2 \
+    -mips32r2 \
+    -mhard-float \
+    -msynci \
+    -mno-fused-madd
+
+arch_variant_ldflags := \
+    -EL

core/llvm_config.mk

@@ -60,7 +60,8 @@ ifeq ($(TARGET_ARCH),mips)
     -mtune=mips32r2 \
     -march=mips32 \
     -mtune=mips32 \
-    -msynci
+    -msynci \
+    -mno-fused-madd
 endif
 ifeq ($(TARGET_ARCH),x86)
   CLANG_CONFIG_EXTRA_CFLAGS += \