MLK-11426: fix mfgtool kernel build error

Fixed build error:

drivers/built-in.o: In function `usb_charger_is_present':
:(.text+0x16d998): undefined reference to `power_supply_changed'
drivers/built-in.o: In function `ci_hdrc_imx_remove':
:(.text+0x16f924): undefined reference to `power_supply_unregister'
drivers/built-in.o: In function `ci_hdrc_imx_probe':
:(.text+0x170094): undefined reference to `power_supply_register'
:(.text+0x170144): undefined reference to `power_supply_unregister

Signed-off-by: Frank Li <Frank.Li@freescale.com>