[PATCH] synclink_gt fix size of register value storage

Fix incorrect variable size used to hold register value.  This bug might
wipe out a portion of the TCR value when setting the interface options.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>