extcon: sm5502: Move sm5502.h header file to extcon directory

This patch move sm5502.h header file from 'include/linux/extcon' to
'driver/extcon' because sm5502.h is used for driver/extcon/extcon-sm5502.c.
and remove duplicate license description.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index a1ba924..f94d66a 100644
--- a/drivers/extcon/extcon-sm5502.c
+++ b/drivers/extcon/extcon-sm5502.c
@@ -8,11 +8,6 @@
  * under  the terms of  the GNU General  Public License as published by the
  * Free Software Foundation;  either version 2 of the  License, or (at your
  * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/err.h>
@@ -26,7 +21,8 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/extcon.h>
-#include <linux/extcon/sm5502.h>
+
+#include "extcon-sm5502.h"
 
 #define	DELAY_MS_DEFAULT		17000	/* unit: millisecond */