omap24xx: Fix serial console for .37

SVN-Revision: 25161

target/linux/omap24xx/base-files/etc/inittab

@@ -1,5 +1,5 @@
 ::sysinit:/etc/init.d/rcS S boot
 ::shutdown:/etc/init.d/rcS K shutdown
 tts/0::askfirst:/bin/ash --login
-ttyS2::askfirst:/bin/ash --login
+ttyO2::askfirst:/bin/ash --login
 tty1::askfirst:/bin/ash --login