draw/texture: handle mip_offset[0] being != 0 for layered textures.

When llvmpipe adds on a layer it uses mip_offset[0] for it, so it
should still be respected even for multisample.

Fixes KHR-GL45.texture_view.view_sampling

Fixes: 839045bcc8 ("gallivm/lp: merge sample info into normal info")
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29685>

src/gallium/auxiliary/draw/draw_llvm.c

@@ -2165,9 +2165,10 @@ draw_llvm_set_mapped_texture(struct draw_context *draw,
    jit_tex->depth = depth;
    jit_tex->first_level = first_level;
    jit_tex->last_level = last_level;
-   jit_tex->mip_offsets[0] = 0;
    jit_tex->base = base_ptr;
+   jit_tex->mip_offsets[0] = 0;
    if (num_samples > 1) {
+      jit_tex->mip_offsets[0] = mip_offsets[0];
       jit_tex->mip_offsets[LP_JIT_TEXTURE_SAMPLE_STRIDE] = sample_stride;
       jit_tex->row_stride[0] = row_stride[0];
       jit_tex->img_stride[0] = img_stride[0];

src/gallium/drivers/llvmpipe/ci/llvmpipe-fails.txt

@@ -1,5 +1,3 @@
-KHR-GL45.texture_view.view_sampling,Fail
-
 dEQP-GLES31.functional.texture.border_clamp.range_clamp.linear_float_color,Fail
 
 dEQP-EGL.functional.robustness.reset_context.shaders.infinite_loop.query_status.compute,Fail