regulator: Build on non-ARM platforms

When the regulator API was merged it was added to the separate Kconfig
which ARM uses for drivers but not the generic one in drivers/.  Since
there is nothing ARM-specific about the API add it there too.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/Kconfig

@@ -68,6 +68,8 @@ source "drivers/ssb/Kconfig"
 
 source "drivers/mfd/Kconfig"
 
+source "drivers/regulator/Kconfig"
+
 source "drivers/media/Kconfig"
 
 source "drivers/video/Kconfig"