etnaviv: Destroy rsc->pending_ctx set in etna_resource_destroy()
Destroy rsc->pending_ctx set in etna_resource_destroy(), otherwise the memory is allocated, never free'd, and becomes unreachable. This fixes a memory leak.
Fixes: 9e672e4d ("etnaviv: keep references to pending resources") Signed-off-by: Marek Vasut marex@denx.de