drm/radeon/dpm: add pcie gen helper function
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 25 Mar 2013 22:28:29 +0000 (18:28 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 27 Jun 2013 23:16:40 +0000 (19:16 -0400)
Add a helper function to determine the preferred
pcie gen based on the card, system, and circumstance.

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

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