mips: Rename MIPSr1_ASM to MIPSr2dsp_ASM to reflect true requirements.

[speachy]

trafficstars

All of the mips code in opus requires a mips32r2 core with dsp or dsp2 extensions, so update the #define to document this appropriately.

I did not rename the various header files that have "mipsr1" in their name, as that seemed like unnecessary churn.

Signed-off-by: Solomon Peachy [email protected]

[jmvalin]

Can you contact the original authors of the patch to see what they have to say about it. I don't really have any way to test that arch.

[neheb]

Does it also require hardware floating point?

[AleXoundOS]

What's the correct way of building opus for mips32r2 (mipsel, little-endian)? How to test this?