v3dv: fix comment in texel buffer shader copy path

When using the texel buffer copy path to copy a buffer we need to
sample from the buffer and for that we need a texture shader state
record where we specify the base offset of the texture (the buffer).
If the copy operation has a start offset we can't add that offset
to the base address of the buffer because the texture state record
requires the base pointer to be 64-byte aligned, so it would only
work for offsets that are multiple of 64B. Instead, we pass the
offset (in elements) to the shader and we use that to shift the
indices into the buffer when selecting the source texel to copy.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17482>

src/broadcom/vulkan/v3dv_meta_copy.c

@@ -2057,13 +2057,10 @@ texel_buffer_shader_copy(struct v3dv_cmd_buffer *cmd_buffer,
    if (result != VK_SUCCESS)
       return handled;
 
-   /* FIXME: for some reason passing region->bufferOffset here for the
-    * offset field doesn't work, making the following CTS tests fail:
-    *
-    * dEQP-VK.api.copy_and_blit.core.buffer_to_image.*buffer_offset*
-    *
-    * So instead we pass 0 here and we pass the offset in texels as a push
-    * constant to the shader, which seems to work correctly.
+   /* We can't pass region->bufferOffset here for the offset field because
+    * the texture base pointer in the texture shader state must be a 64-byte
+    * aligned value. Instead, we use 0 here and we pass the offset in texels
+    * as a push constant to the shader.
     */
    VkDevice _device = v3dv_device_to_handle(cmd_buffer->device);
    VkBufferViewCreateInfo buffer_view_info = {