drm/i915: restore fixed FDI link rate on Sandybridge

FDI_PLL_BIOS_0 register is for Ironlake only, don't apply to
Sandybridge.

Original-patch-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed