Add regulator compatibility string to Kconfig.fixed file
and allow fixed regulator driver to be enabled when compatible
node is defined. However, remove this option from common Kconfig
as it is legitimate to enable/disable regulator support.
Change menuconfig REGULATOR_FIXED to config since this
menu nesting is not necessary.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This provides structure for the regulator device hierarchy and a
driver for GPIO-controlled regulators along with its binding.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>