spi: fsi: Increase timeout and ensure status is checked

Only timeout after at least one iteration of checking the
status registers. In addition, increase the transfer timeout
to 1 second.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20220623140547.71762-1-eajames@linux.ibm.com


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