i965/fs: detect different bit size accesses to uniforms to push them in proper locations

i965/fs: detect different bit size accesses to uniforms to push them in proper locations

Previously, if we had accesses with different sizes to the same uniform, we might not
push it aligned with the bigger one. This is a problem in BSW/BXT when we access
an array of DF uniform with both direct and indirect addressing because for the latter
we use 32-bit MOV INDIRECT instructions. However this problem can happen with other
generations and bitsizes.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Cc: "17.0" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>