usb: gadget: use config_ep_by_speed() instead of ep_choose()

Remove obsolete functions:
1. ep_choose()
2. usb_find_endpoint()

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c
index dc63f16..0d6d260 100644
--- a/drivers/usb/gadget/f_phonet.c
+++ b/drivers/usb/gadget/f_phonet.c
@@ -429,12 +429,12 @@
 		if (alt == 1) {
 			int i;
 
-			fp->out_ep->desc = ep_choose(gadget,
-					&pn_hs_sink_desc,
-					&pn_fs_sink_desc);
-			fp->in_ep->desc = ep_choose(gadget,
-					&pn_hs_source_desc,
-					&pn_fs_source_desc);
+			if (config_ep_by_speed(gadget, f, fp->in_ep) ||
+			    config_ep_by_speed(gadget, f, fp->out_ep)) {
+				fp->in_ep->desc = NULL;
+				fp->out_ep->desc = NULL;
+				return -EINVAL;
+			}
 			usb_ep_enable(fp->out_ep);
 			usb_ep_enable(fp->in_ep);