i965: Adjust fast-clear resolve rect for BDW
i965: Adjust fast-clear resolve rect for BDW

The scale factors for the resolve rectangle change for BDW and we have
to look at brw->gen now to figure out how big it should be.

Fixes: https://bugs.freedesktop.org/attachment.cgi?id=105777
Cc: "10.3" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Signed-off-by: Kristian Høgsberg <ca9b5b1e27d4fa7f4ba6848bdd08ca52cfd6330c@bitplanet.net>
Reviewed-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>

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