Input: move the new KEY_SELECTIVE_SCREENSHOT keycode

We should try to keep keycodes sequential unless there is a reason to leave
a gap in numbering, so let's move it from 0x280 to 0x27a while we still
can.

Fixes: 3b059da9 ("Input: allocate keycode for Selective Screenshot key")
Acked-by: Rajat Jain <rajatja@google.com>
Link: https://lore.kernel.org/r/20200326182711.GA259753@dtor-wsSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

include/uapi/linux/input-event-codes.h

@@ -653,7 +653,7 @@
 #define KEY_PRIVACY_SCREEN_TOGGLE	0x279
 
 /* Select an area of screen to be copied */
-#define KEY_SELECTIVE_SCREENSHOT	0x280
+#define KEY_SELECTIVE_SCREENSHOT	0x27a
 
 /*
  * Some keyboards have keys which do not have a defined meaning, these keys