i965/fs: Simplify FS_OPCODE_SET_OMASK stride mashing a bit.

In the first case, we can simply call stride(mask, 16, 8, 2) rather than
creating a new register with a different stride, then immediately
changing it a second time.

In the second case, the stride was already what we wanted, so we can
just use mask without any changes at all.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
1 file changed