Refine function MipsCpuCaps.
Refine function MipsCpuCaps.

1. Refactored function MipsCpuCaps.
2. allow msa and mmi can be enabled together.

Signed-off-by: Jiaxun Yang <accc0069bb3ff62ae1a181f9cf05aee7ddbd8eff@flygoat.com>
Signed-off-by: Shiyou Yin <95ebe55dade5ae654e1969116435bcdcabc15f88@loongson.cn>
Change-Id: I7330d0551a6a167e4c76d37e4defcc20783f5815
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/2131145
Reviewed-by: Hsiu Wang <30eba2f7270a93b2f7cf61ae5746a4843cbe4397@google.com>
Reviewed-by: Frank Barchard <52415189a3f67d375195cbbb6fdb1f1759498e57@chromium.org>
Commit-Queue: Frank Barchard <52415189a3f67d375195cbbb6fdb1f1759498e57@chromium.org>

lemenkov/libyuv,lemenkov/libyuv,lemenkov/libyuv,lemenkov/libyuv