i965: initialize more device info fields for Cherryview

The intent in 9b6b084eb7 was
for urb .size and .min_vs_entries fields to use the values
from the GEN8_FEATURES macro.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i965/brw_device_info.c

@@ -231,6 +231,8 @@ static const struct brw_device_info brw_device_info_chv = {
    .max_gs_threads = 70,
    .max_wm_threads = 102,
    .urb = {
+      .size = 128,
+      .min_vs_entries = 64,
       .max_vs_entries = 640,
       .max_gs_entries = 256,
    }