uio: uio_pdrv_genirq: Do not log an error when deferring probe routine.

When deferring the probe routine just return without displaying an
error.

Signed-off-by: Oscar Ravadilla <oscar.ravadilla@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200108001648.2949-1-oscar.ravadilla@alliedtelesis.co.nz


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