Revert "i965/fs: Don't emit SEL instructions for type-converting MOVs."

Revert "i965/fs: Don't emit SEL instructions for type-converting MOVs."

This reverts commit 7dccd38b400d3a65da20ddefe282a7bb0b7ccb58.

d2x pass fixes SEL instructions when there is a type conversion
by doing a SEL without type conversion and then convert the result.
This pass also takes into account the non-uniform control flow.

Then, 7dccd38b400d3a65da20ddefe282a7bb0b7ccb58 is not needed anymore.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>