turnip: fix integer render targets

turnip: fix integer render targets

Add missing required bits.  Fixes at least:

dEQP-VK.pipeline.render_to_image.dedicated_allocation.1d.small.r16g16_sint_d24_unorm_s8_uint
dEQP-VK.pipeline.render_to_image.dedicated_allocation.2d.mipmap.r16g16_sint_d24_unorm_s8_uint
dEQP-VK.renderpass.dedicated_allocation.attachment.4.401
dEQP-VK.renderpass2.suballocation.formats.r16_uint.load.draw
dEQP-VK.synchronization.op.single_queue.barrier.write_draw_read_copy_image_to_buffer.image_128x128_r16_uint

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Eric Anholt <eric@anholt.net>