panfrost: save/restore image state around resource conversion
What does this MR do and why?
panfrost: save/restore image state around resource conversion
pan_resource_modifier_convert can use a blit to convert images
from AFBC. If we call this from panfrost_set_shader_images then
we end up trashing the images that we're trying to set
up for the current shader (they get replaced by the blit shader).
Fix this by saving/restoring the shader image state under
construction.
This fixes a crash in piglit oes_egl_image_external_essl3 tests.
Edited by Eric Smith