drm/xe/ptl: Drop force_probe requirement

Panther Lake has proven to be stable through testing and use.

Remove the force_probe requirement and enable the platform by default.

Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://lore.kernel.org/r/20250707201959.319406-1-matthew.s.atwood@intel.com


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