USB: Check no positive return values from pm_runtime_resume_and_get()

pm_runtime_resume_and_get() always returns a negative error code or zero;
there's no need to check for positive values such as returned by
pm_runtime_get_sync(). Simply drop the check.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://lore.kernel.org/r/20250815113121.925641-1-sakari.ailus@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>