Input: yealink - define packet offset __be16 instead of u16

sparse says

 warning: incorrect type in assignment (different base types)
    expected unsigned short [unsigned] [usertype] offset
    got restricted __be16 [usertype] <noident>

for every usage of cpu_to_be16 in yealink.c. Defining it __be16 in the
first place shouldn't hurt.
Signed-off-by: NMartin Kepplinger <martin.kepplinger@ginzinger.com>
Signed-off-by: Henk.Vergonet@gmail.com
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/yealink.h

@@ -28,7 +28,7 @@
 struct yld_ctl_packet {
 	u8	cmd;		/* command code, see below */
 	u8	size;		/* 1-11, size of used data bytes. */
-	u16	offset;		/* internal packet offset */
+	__be16	offset;		/* internal packet offset */
 	u8	data[11];
 	s8	sum;		/* negative sum of 15 preceding bytes */
 } __attribute__ ((packed));