[Pixman] [PATCH 2/3] Moving helper functions in pixman-sse2.c to pixman-sse2.h.

[Chris Wilson]

Quoting Raghuveer Devulapalli (2019-01-17 00:59:59)
> From: raghuveer devulapalli <raghuveer.devulapalli at intel.com>
> 
> These helper function will be reused in pixman-avx2.c implementations in
> the future.

Are we ever going to run into a naming conflict in the future? Is it
worth prefixing all the inlines with sse2_? Probably makes sense so that
we can see the instruction set used when mixing later.
-Chris