drm/xe: Remove leftover pxp comment

Not being able to initialize pxp is fatal if the platform is expected to
have it. Update comment after commit 9c9dc9b ("drm/xe/pxp: Fail the
load if PXP fails to initialize").

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213192909.996148-6-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

Author: lucasdemarchi

drivers/gpu/drm/xe/xe_device.c

@@ -878,7 +878,6 @@ int xe_device_probe(struct xe_device *xe)
 	if (err)
 		goto err_fini_oa;
 
-	/* A PXP init failure is not fatal */
 	err = xe_pxp_init(xe);
 	if (err)
 		goto err_fini_display;