spi: xcomm: fix coding style

Just cosmetics. No functional change intended.

While at it, removed a couple of redundant else if() statements.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-4-b10842fc9636@analog.com


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