drm/xe/pm: Wire up suspend/resume for I2C controller

Wire up suspend/resume handles for I2C controller to match its power
state with SGUnit.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Karthik Poosa <karthik.poosa@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://lore.kernel.org/r/20250701122252.2590230-5-heikki.krogerus@linux.intel.com


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>