usb: typec: ucsi: Add conditional dependency on USB role switch

Preventing the driver from being built-in when USB Role
Switch Class is being build as module. That fixes a
potential undefined reference error.

Fixes: 89795852 ("usb: typec: ucsi: Add support for USB role switch")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210119083405.18325-1-heikki.krogerus@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/ucsi/Kconfig

@@ -3,6 +3,7 @@
 config TYPEC_UCSI
 	tristate "USB Type-C Connector System Software Interface driver"
 	depends on !CPU_BIG_ENDIAN
+	depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
 	help
 	  USB Type-C Connector System Software Interface (UCSI) is a
 	  specification for an interface that allows the operating system to