usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --cc drivers/usb/gadget/Makefile
Simple merge

diff --cc drivers/usb/gadget/function/Makefile
Simple merge

diff --cc drivers/usb/gadget/function/f_acm.c
Simple merge

diff --cc drivers/usb/gadget/function/f_ecm.c
Simple merge

diff --cc drivers/usb/gadget/function/f_eem.c
Simple merge

diff --cc drivers/usb/gadget/function/f_fs.c
Simple merge

diff --cc drivers/usb/gadget/function/f_hid.c
Simple merge

diff --cc drivers/usb/gadget/function/f_loopback.c
Simple merge

diff --cc drivers/usb/gadget/function/f_mass_storage.c
Simple merge

diff --cc drivers/usb/gadget/function/f_mass_storage.h
Simple merge

diff --cc drivers/usb/gadget/function/f_midi.c
Simple merge

diff --cc drivers/usb/gadget/function/f_ncm.c
Simple merge

diff --cc drivers/usb/gadget/function/f_obex.c
Simple merge

diff --cc drivers/usb/gadget/function/f_phonet.c
Simple merge

diff --cc drivers/usb/gadget/function/f_rndis.c
Simple merge

diff --cc drivers/usb/gadget/function/f_serial.c
Simple merge

diff --cc drivers/usb/gadget/function/f_sourcesink.c
Simple merge

diff --cc drivers/usb/gadget/function/f_subset.c
Simple merge

diff --cc drivers/usb/gadget/function/f_uac1.c
Simple merge

diff --cc drivers/usb/gadget/function/f_uac2.c
Simple merge

diff --cc drivers/usb/gadget/function/f_uvc.c
Simple merge

diff --cc drivers/usb/gadget/function/f_uvc.h
Simple merge

diff --cc drivers/usb/gadget/function/g_zero.h
Simple merge

diff --cc drivers/usb/gadget/function/ndis.h
Simple merge

diff --cc drivers/usb/gadget/function/rndis.c
Simple merge

diff --cc drivers/usb/gadget/function/rndis.h
Simple merge

diff --cc drivers/usb/gadget/function/storage_common.c
Simple merge

diff --cc drivers/usb/gadget/function/storage_common.h
Simple merge

diff --cc drivers/usb/gadget/function/u_ecm.h
Simple merge

diff --cc drivers/usb/gadget/function/u_eem.h
Simple merge

diff --cc drivers/usb/gadget/function/u_ether.c
Simple merge

diff --cc drivers/usb/gadget/function/u_ether.h
Simple merge

diff --cc drivers/usb/gadget/function/u_ether_configfs.h
Simple merge

diff --cc drivers/usb/gadget/function/u_fs.h
Simple merge

diff --cc drivers/usb/gadget/function/u_gether.h
Simple merge

diff --cc drivers/usb/gadget/function/u_ncm.h
Simple merge

diff --cc drivers/usb/gadget/function/u_phonet.h
Simple merge

diff --cc drivers/usb/gadget/function/u_rndis.h
Simple merge

diff --cc drivers/usb/gadget/function/u_serial.c
Simple merge

diff --cc drivers/usb/gadget/function/u_serial.h
Simple merge

diff --cc drivers/usb/gadget/function/u_uac1.c
Simple merge

diff --cc drivers/usb/gadget/function/u_uac1.h
Simple merge

diff --cc drivers/usb/gadget/function/uvc.h
Simple merge

diff --cc drivers/usb/gadget/function/uvc_queue.c
Simple merge

diff --cc drivers/usb/gadget/function/uvc_queue.h
Simple merge

diff --cc drivers/usb/gadget/function/uvc_v4l2.c
Simple merge

diff --cc drivers/usb/gadget/function/uvc_video.c
Simple merge

diff --cc drivers/usb/gadget/legacy/Makefile
Simple merge