i965: Account for view parameters in fast depth clears

V2: - No need for layer_multiplier; multisampled depth surfaces are IMS.
    - Remove unused num_layers.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Eric Anholt <eric@anholt.net>
1 file changed