drm/i915: Clean up the {ilk,lpt}_pch_enable() calling convention

drm/i915: Clean up the {ilk,lpt}_pch_enable() calling convention

Use the clean "atomic_state+crtc" approach of passing
arguments to the top level PCH modeset code.

And while at it we can also just pass the whole crtc to
ilk_disable_pch_transcoder().

v2: Elimiate double space between function args (Dave)

Cc: Dave Airlie <airlied@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015071625.593-4-ville.syrjala@linux.intel.com
Reviewed-by: Dave Airlie <airlied@redhat.com>