[PATCH -next] power: fix bq27x00_battery kconfig

[Xiong Zhou <jencce.kernel@gmail.com>]

From: Xiong Zhou <jencce.kernel@gmail.com>

This patch fixes build failure(randconfig) of next-20130501.
When config I2C as m, BATTERY_BQ27x00 as y, here comes the failure.
BATTERY_BQ27x00 depends on I2C according to the code.

Failure message:
drivers/built-in.o: In function `bq27x00_read_i2c':
bq27x00_battery.c:(.text+0x1082a7): undefined reference to `i2c_transfer'
drivers/built-in.o: In function `bq27x00_battery_init':
bq27x00_battery.c:(.init.text+0x6085): undefined reference to `i2c_register_driver'
bq27x00_battery.c:(.init.text+0x60c7): undefined reference to `i2c_del_driver'
drivers/built-in.o: In function `bq27x00_battery_exit':
bq27x00_battery.c:(.exit.text+0xbf0): undefined reference to `i2c_del_driver'
make: *** [vmlinux] Error 1

Signed-off-by: Xiong Zhou <jencce.kernel@gmail.com>
---
drivers/power/Kconfig |    1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 0d0b5d7..89e5ebd 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -152,6 +152,7 @@ config BATTERY_SBS
 
 config BATTERY_BQ27x00
 	tristate "BQ27x00 battery driver"
+	depends on I2C
 	help
 	  Say Y here to enable support for batteries with BQ27x00 (I2C/HDQ) chips.