usb: gadget: Move gadget functions code

3.18 kernel has reorganized drivers/usb/gadget
directory. Moving gadget functions drivers from
drivers/usb/gadget to drivers/usb/gadget/function

Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I1eab0190f8d42e3be1b4e91ad3bc3a2dc853b0ef

drivers/usb/gadget/Makefile

@@ -10,10 +10,3 @@ libcomposite-y			:= usbstring.o config.o epautoconf.o
 libcomposite-y			+= composite.o functions.o configfs.o u_f.o
 
 obj-$(CONFIG_USB_GADGET)	+= udc/ function/ legacy/
-
-usb_f_mtp-y			:= f_mtp.o
-obj-$(CONFIG_USB_F_MTP)		+= usb_f_mtp.o
-usb_f_ptp-y			:= f_ptp.o
-obj-$(CONFIG_USB_F_PTP)		+= usb_f_ptp.o
-usb_f_audio_source-y		:= f_audio_source.o
-obj-$(CONFIG_USB_F_AUDIO_SRC)	+= usb_f_audio_source.o

drivers/usb/gadget/function/Makefile

@@ -44,3 +44,9 @@ usb_f_hid-y			:= f_hid.o
 obj-$(CONFIG_USB_F_HID)		+= usb_f_hid.o
 usb_f_printer-y			:= f_printer.o
 obj-$(CONFIG_USB_F_PRINTER)	+= usb_f_printer.o
+usb_f_mtp-y                     := f_mtp.o
+obj-$(CONFIG_USB_F_MTP)         += usb_f_mtp.o
+usb_f_ptp-y                     := f_ptp.o
+obj-$(CONFIG_USB_F_PTP)         += usb_f_ptp.o
+usb_f_audio_source-y            := f_audio_source.o
+obj-$(CONFIG_USB_F_AUDIO_SRC)   += usb_f_audio_source.o