anv: deal with isl format swizzles for buffer views
For some formats like VK_FORMAT_B5G6R5_UNORM_PACK16, we have no direct matching HW format. We can support it by swizzling.
We already apply those swizzles for image views. We just forgot to deal with buffer views.
Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com Cc: mesa-stable Closes: #6235 (closed)