anv: Add statistic for 'GRF registers' for Xe3+

For Xe3+ the registers are tightly packed to make better use of GRF
space, so add a statistic to keep track of how many registers were used.
For previous versions this is not useful since the code is spreading
the registers among the whole space.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33311>
1 file changed