spi: delete non-required instances of include <linux/init.h>

spi: delete non-required instances of include <linux/init.h>

None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>.  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit 3a44623d5e1404b29786f1afd225d1aa04a4ae90)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>