mfd: dt-bindings: Provide human readable define for Clocksource mode

ST's Low Power Controller can now operate in three supported modes;
Watchdog, Real Time Clock and most recently as a Clocksource.  This new
define will allow the LPC IP to be configured for Clocksource from DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
1 file changed