mfd: arizona: Add defines for GPSW values that can be used from DT

Add defines for the possible values the GPSW can be set to using the
wlf,gpsw device tree binding.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
1 file changed