regulator: Sort Kconfig and Makefile entries

Sort Kconfig entries by company name/driver in alphabetical order.
Sort Makefile entries by alphabetical order.

In order to group all the Kconfig entries by company name,
this patch also adds company name to some Kconfig entries.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>