spi: fix probe/remove section markings

Probe/remove functions need to be marked as __devinit and __devexit
(not __init an __exit) to prevent trying to run code that has been
discarded.  This patch fixes the spi_imx driver to mark probe and
remove correctly.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --cc drivers/spi/spi_imx.c
Simple merge