drm/i915: Do not print 'pxp init failed with 0' when it succeed

It is misleading, if the intention was to also print something
in case it succeed it should have a different string.

Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Fixes: 698e19da ("drm/i915: Skip pxp init if gt is wedged")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240320210547.71937-1-jose.souza@intel.com
(cherry picked from commit d437099a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/i915/i915_driver.c

@@ -800,7 +800,7 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_cleanup_modeset2;
 
 	ret = intel_pxp_init(i915);
-	if (ret != -ENODEV)
+	if (ret && ret != -ENODEV)
 		drm_dbg(&i915->drm, "pxp init failed with %d\n", ret);
 
 	ret = intel_display_driver_probe(i915);