pinctrl: spear: make bool drivers explicitly non-modular

None of the Kconfigs for any of these drivers are tristate,
meaning that they currently are not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the drivers there is no doubt they are builtin-only.  All
drivers get the exact same change, so they are handled in batch.

Changes are (1) use init.h header in place of module.h header,
(2) delete module_exit related code, (3) delete MODULE_DEVICE_TABLE,
and (4) delete MODULE_LICENCE/MODULE_AUTHOR and associated tags.

None of these drivers were using module_init() so we don't have to
worry about the init ordering getting changed with this commit.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

We also delete the MODULE_LICENSE etc. tags since all that information
is already contained at the top of each file in the comments.

Cc: spear-devel@list.st.com
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul...