soc: qcom: Bring in qpnp-misc driver

qpnp-misc driver supports accessing MISC peripheral registers
in certain PMICs. Bring that in.

This snapshot is taken as of msm-4.4
'commit 9af69213de64 ("Merge "block: Move bdi_unregister() to
del_gendisk()"")'

Fixed a couple of minor issues to solve checkpatch errors.
 - Use const qualifier for qpnp_misc_match_table
 - Fixed a block comment

Also, moved the location of qpnp-misc.h from include/linux to
include/linux/qpnp.

Change-Id: Iad670e41cc9b95725cf0c651c835a782314f0015
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>