Fix a stupid bug in the sysrq handling in sn_console.c.  Instead of eating all 
characters in the sysrq string (preventing them from getting to the tty 
layer), only eat those following 'ESC' since that's a pretty important 
character for various things.  Please apply before 2.6.9 is released as the 
console is very unfriendly to use without it.

Signed-off-by: Jesse Barnes <jbarnes@sgi.com>

Thanks,
Jesse