drm/i915: unify icp, tgp and mcc irq handling

drm/i915: unify icp, tgp and mcc irq handling

The differences are only on the pins, trigger and long_detect function.
The MCC handling is already partially merged, so merge TGP as well.
Remove the pins argument from icp_irq_handler() so we have all the
differences between the 3 set in a common if ladder.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190829211526.30525-2-jose.souza@intel.com
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>