regulator: Fixed voltage regulator registration APIs
Some new convenience APIs for registering fixed voltage regulators.
* tag 'topic/fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: extend the fixed dummy voltage regulator to accept voltage
regulator: support multiple dummy fixed regulators
Dependency for renesas/board branch.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>