etnaviv: fix dirty bit check for baselod emission
Since baselod is stored in sampler state, not sampler view, we should check the ETNA_DIRTY_SAMPLERS bit instead of ETNA_DIRTY_SAMPLER_VIEWS.
Since baselod is stored in sampler state, not sampler view, we should check the ETNA_DIRTY_SAMPLERS bit instead of ETNA_DIRTY_SAMPLER_VIEWS.