Linux: Search a smaller set of potential joystick axes.

Newer kernels seem to report bogus axes in the higher ranges, for example
 with a standard PlayStation 3 controller plugged in via USB.

src/joystick/linux/SDL_sysjoystick.c

@@ -703,7 +703,7 @@ EV_ConfigJoystick(SDL_Joystick * joystick, int fd)
                 ++joystick->nbuttons;
             }
         }
-        for (i = 0; i < ABS_MAX; ++i) {
+        for (i = 0; i < ABS_MISC; ++i) {
             /* Skip hats */
             if (i == ABS_HAT0X) {
                 i = ABS_HAT3Y;