drm/i915: rename intel_enable_pch_pll to ironlake_enable_pch_pll

Because this function is only for the older PCHs, not the newer ones.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed