radv: Fixup for radv_nir_get_max_workgroup_size
The rename was missed in a couple of places
Fixes: 9b9ccee4 ("radv: take LDS into account for compute shader occupancy stats") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109531
Signed-of-by: Mike Lothian mike@fireburn.co.uk