usb: musb: fix spelling of families in Kconfig

Trivial patch fixin spelling of families in Kconfig

[ balbi@ti.com : added the obvious commit log ]
Signed-off-by: NPeter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/musb/Kconfig

@@ -20,7 +20,7 @@ config USB_MUSB_HDRC
 	  it's being used with, including the USB peripheral role,
 	  or the USB host role, or both.
 
-	  Texas Instruments familiies using this IP include DaVinci
+	  Texas Instruments families using this IP include DaVinci
 	  (35x, 644x ...), OMAP 243x, OMAP 3, and TUSB 6010.
 
 	  Analog Devices parts using this IP include Blackfin BF54x,