spi: spl022: fix Microwire full duplex mode

[ Upstream commit d81d0e41 ]

There are missing braces in the function that verify controller parameters,
then an error is always returned when the parameter to select Microwire
frames operation is used on devices allowing it.

Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Link: https://lore.kernel.org/r/20211022142104.1386379-1-thomas.perrot@bootlin.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>