freedreno: Fix "Offset of packed bitfield changed" warnings:
Example:
../src/freedreno/ir2/instr-a2xx.h:384:1: note: offset of packed bit-field
‘const_index’ has changed in GCC 4.4
384 | } instr_fetch_vtx_t;
It's apparently due to bitfields that would cross the width of their type. Just expand the types of the affected fields so that the compiler quiets down.
Edited by Emma Anholt