greybus: es2: comment out unused functions

The Qualcomm kernel builds with -Werror so the existing es2.c driver
breaks the build due to unused static functions.  As we are still
hashing out exactly how to implement this logic at the moment, just
comment out the functions to make the build be clean, no logic changes
happen here at all.
Reported-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/es2.c

@@ -136,6 +136,8 @@ static int cport_to_ep_pair(struct es1_ap_dev *es1, u16 cport_id)
 
 #define ES1_TIMEOUT	500	/* 500 ms for the SVC to do something */
 
+/* Disable for now until we work all of this out to keep a warning-free build */
+#if 0
 /* Test if the endpoints pair is already mapped to a cport */
 static int ep_pair_in_use(struct es1_ap_dev *es1, int ep_pair)
 {
@@ -191,6 +193,7 @@ static int unmap_cport(struct es1_ap_dev *es1, u16 cport_id)
 {
 	return map_cport_to_ep(es1, cport_id, 0);
 }
+#endif
 
 static struct urb *next_free_urb(struct es1_ap_dev *es1, gfp_t gfp_mask)
 {