spi: lpspi: Silence error message upon deferred probe

spi: lpspi: Silence error message upon deferred probe

[ Upstream commit 12f62a857c83b2efcbf8d9961aacd352bf81ad3d ]

Do not print error messages with error code -517. Silences the following
errors upon on imx8qm:
fsl_lpspi 5a000000.spi: spi_register_controller error: -517
fsl_lpspi 5a010000.spi: spi_register_controller error: -517
fsl_lpspi 5a020000.spi: spi_register_controller error: -517

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20211108145523.1797609-1-alexander.stein@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 3b577de206d5 ("spi: spi-fsl-lpspi: Undo runtime PM changes at driver exit time")
Signed-off-by: Sasha Levin <sashal@kernel.org>