xfs: print name of function causing fs shutdown instead of hex pointer

In xfs_do_force_shutdown, print the symbolic name of the function that
called us to shut down the filesystem instead of a raw hex pointer.
This makes debugging a lot easier:

XFS (sda): xfs_do_force_shutdown(0x2) called from line 2440 of file
	fs/xfs/xfs_log.c. Return address = ffffffffa038bc38

becomes:

XFS (sda): xfs_do_force_shutdown(0x2) called from line 2440 of file
	fs/xfs/xfs_log.c. Return address = xfs_trans_mod_sb+0x25
Signed-off-by: NDarrick J. Wong <djwong@kernel.org>
Reviewed-by: NBrian Foster <bfoster@redhat.com>
Reviewed-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by: NChandan Babu R <chandanrlinux@gmail.com>

fs/xfs/xfs_fsops.c

@@ -543,7 +543,7 @@ xfs_do_force_shutdown(
 	}
 
 	xfs_notice(mp,
-"%s(0x%x) called from line %d of file %s. Return address = "PTR_FMT,
+"%s(0x%x) called from line %d of file %s. Return address = %pS",
 		__func__, flags, lnnum, fname, __return_address);
 
 	if (flags & SHUTDOWN_CORRUPT_INCORE) {