nokia_rx51: Typo in CONFIG_MUSB_HCD fixup

CONFIG_MUSB_HDC should be CONFIG_MUSB_HCD to have any effect.
Signed-off-by: NPaul Kocialkowski <contact@paulk.fr>

include/configs/nokia_rx51.h

@@ -109,7 +109,7 @@
 
 /* USB */
 #define CONFIG_MUSB_UDC
-#define CONFIG_MUSB_HDC
+#define CONFIG_MUSB_HCD
 #define CONFIG_USB_OMAP3
 #define CONFIG_TWL4030_USB