drm/i915/cnl: Enable DDI-F on Cannonlake.
Now let's finish the Port-F support by adding the proper port F detection, irq and power well support. v2: Rebase v3: Use BIT_ULL v4: Cover missed case on ddi init. v5: Update commit message. v6: Rebase on top of display headers rework. v7: Squash power-well handling related to DDI F to this patch to avoid warns as pointed out by DK. v8: Introduce DDI_F_LANES to PG2. (DK) v9: Squash in the PORT_F case for enabling DP MST encoder. (DK) Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: David Weinehall <david.weinehall@linux.intel.com> Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180129232223.766-9-rodrigo.vivi@intel.com
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