radv: Write RSRC2_GS for NGGC when pipeline is dirty but not emitted.
Found while testing the new fast clear path together with NGGC.
Thanks to masush5 in the community for finding this issue.
radv_emit_graphics_pipeline will not emit anything (including this register) when the pipeline is already emitted. Hence, improve the check in radv_emit_ngg_culling_state to consider this.