rename MIPS_DSPR2 to DSPR2 for consistency

source/rotate_mips.cc

Index: source/rotate_mips.cc
diff --git a/source/rotate_mips.cc b/source/rotate_mips.cc
index efe6bd909e177407eb3c9c987f5f70f717f45466..23e89fbad4c0c89368a18d868c6523a435e7bcad 100644
--- a/source/rotate_mips.cc
+++ b/source/rotate_mips.cc
@@ -22,7 +22,7 @@ extern "C" {
     defined(__mips_dsp) && (__mips_dsp_rev >= 2) && \
     (_MIPS_SIM == _MIPS_SIM_ABI32)
 
-void TransposeWx8_MIPS_DSPR2(const uint8* src, int src_stride,
+void TransposeWx8_DSPR2(const uint8* src, int src_stride,
                              uint8* dst, int dst_stride, int width) {
    __asm__ __volatile__ (
       ".set push                                         \n"
@@ -106,7 +106,7 @@ void TransposeWx8_MIPS_DSPR2(const uint8* src, int src_stride,
   );
 }
 
-void TransposeWx8_Fast_MIPS_DSPR2(const uint8* src, int src_stride,
+void TransposeWx8_Fast_DSPR2(const uint8* src, int src_stride,
                                   uint8* dst, int dst_stride, int width) {
   __asm__ __volatile__ (
       ".set noat                                         \n"
@@ -308,7 +308,7 @@ void TransposeWx8_Fast_MIPS_DSPR2(const uint8* src, int src_stride,
   );
 }
 
-void TransposeUVWx8_MIPS_DSPR2(const uint8* src, int src_stride,
+void TransposeUVWx8_DSPR2(const uint8* src, int src_stride,
                                uint8* dst_a, int dst_stride_a,
                                uint8* dst_b, int dst_stride_b,
                                int width) {