extcon: max77693: Make max77693_extcon_cable static

'max77693_extcon_cable' is used only in this file. Hence
make it static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>

drivers/extcon/extcon-max77693.c

@@ -185,7 +185,7 @@ enum {
 	_EXTCON_CABLE_NUM,
 };
 
-const char *max77693_extcon_cable[] = {
+static const char *max77693_extcon_cable[] = {
 	[EXTCON_CABLE_USB]			= "USB",
 	[EXTCON_CABLE_USB_HOST]			= "USB-Host",
 	[EXTCON_CABLE_TA]			= "TA",