usb: gadget: nokia: use function framework for ACM

This patch converts the acm_ms gadget to make use of the function
framework to request the ACM function.

The "old" include interface for acm is now removed since nokia was the
last user of it (for ACM).

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 1deadde..e1d3e08 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -831,6 +831,7 @@
 	depends on PHONET
 	select USB_LIBCOMPOSITE
 	select USB_U_SERIAL
+	select USB_F_ACM
 	help
 	  The Nokia composite gadget provides support for acm, obex
 	  and phonet in only one composite gadget driver.