drm/radeon: update rb setup for hawaii
authorAlex Deucher <alexander.deucher@amd.com>
Thu, 8 Aug 2013 00:14:08 +0000 (20:14 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Fri, 8 Nov 2013 17:33:42 +0000 (12:33 -0500)
The formula needs to be adjusted since there are 4 RBs
per SH rather than 2 as on previous asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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