regulator: lp872x: Don't allow modular build

Fixes link failure due to devm_gpio_request_one()

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 870f7300..434462a 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -20,6 +20,7 @@
 
 	  If unsure, say no.
 
+
 if REGULATOR
 
 config REGULATOR_DEBUG
@@ -225,7 +226,7 @@
 	 on National Semiconductors LP3972 PMIC
 
 config REGULATOR_LP872X
-	tristate "TI/National Semiconductor LP8720/LP8725 voltage regulators"
+	bool "TI/National Semiconductor LP8720/LP8725 voltage regulators"
 	depends on I2C
 	select REGMAP_I2C
 	help