usb: gadget: Include i.MX processors in the USB_FSL_USB2 help text

USB_FSL_USB2 driver can be used on PowerPC and i.MX processors.

Include i.MX processors in the USB_FSL_USB2 help text.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/Kconfig

@@ -161,7 +161,7 @@ config USB_FSL_USB2
 	select USB_GADGET_DUALSPEED
 	select USB_FSL_MPH_DR_OF if OF
 	help
-	   Some of Freescale PowerPC processors have a High Speed
+	   Some of Freescale PowerPC and i.MX processors have a High Speed
 	   Dual-Role(DR) USB controller, which supports device mode.
 
 	   The number of programmable endpoints is different through