[PATCH] phy: cpcap-usb: Fix build by adding a dependency to CONFIG_IIO

[Tony Lindgren]

We need the ADC output provided by IIO to detect VBUS level.
Otherwise we can get:

drivers/built-in.o: In function `cpcap_usb_detect':
phy-cpcap-usb.c:(.text+0x18ad): undefined reference to
`iio_read_channel_processed'
drivers/built-in.o: In function `cpcap_usb_phy_probe':
phy-cpcap-usb.c:(.text+0x1c5e): undefined reference to
`devm_iio_channel_get'
phy-cpcap-usb.c:(.text+0x1c92): undefined reference to`iio_get_channel_type'

Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
 drivers/phy/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -49,7 +49,7 @@ config PHY_BERLIN_SATA
 
 config PHY_CPCAP_USB
 	tristate "CPCAP USB PHY driver"
-	depends on USB_SUPPORT
+	depends on USB_SUPPORT && IIO
 	select GENERIC_PHY
 	select USB_PHY
 	help
-- 
2.12.1