drm/i915: Pass the PLL hw_state to pll->enable()

drm/i915: Pass the PLL hw_state to pll->enable()

Stop rummaging around inside pll->state directly in the low
level pll->enable() functions, and instead let the higher level
code figure out where the correct state is stored and pass it in.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412182703.19916-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>