[PATCH] proc: fix duplicate line in /proc/devices

Fix a duplicate block device line printed after the "Block device" header
in /proc/devices.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>