Input: logips2pp - fix button mapping for MX300

MX300 does not have an EXTRA_BTN - it is a simple wheel mouse with
an additional task-switcher button, which is reported as side button
(and not task button).

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index 2f0d288..54b696c 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -238,8 +238,7 @@
 		{ 100,	PS2PP_KIND_MX,					/* MX510 */
 				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
 				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
-		{ 111,  PS2PP_KIND_MX,					/* MX300 */
-				PS2PP_WHEEL | PS2PP_EXTRA_BTN | PS2PP_TASK_BTN },
+		{ 111,  PS2PP_KIND_MX,	PS2PP_WHEEL | PS2PP_SIDE_BTN },	/* MX300 reports task button as side */
 		{ 112,	PS2PP_KIND_MX,					/* MX500 */
 				PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
 				PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },