mfd: Delete non-required instances of include <linux/init.h>

mfd: 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: Lee Jones <lee.jones@linaro.org>
(cherry picked from commit 3c699105d0376c14940ce7cf561754a94cdff8dd)

Signed-off-by: Chang Rebecca Swee Fun <rebecca.swee.fun.chang@intel.com>