libfc: Differentiate echange timer cancellation debug statements

There are two debug statements with the same output string regarding
echange timer cancellation. This patch simply changes the output of
one string so that they can be differentiated.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>