panvk: re-enable fragmentStoresAndAtomics
panvk: re-enable fragmentStoresAndAtomics
This feature works on v10, but some tests which use it trigger
other bugs. In particular, the panfrost code sometimes wrote
shadow_mask *after* color, which does not work (the ATEST
instruction generated for the color write needs to come after
the shadow mask is written to). Fix this by adding some
additional checks to pan_nir_lower_zs_store.