atm: fix direct casts of pointers to u32 in the InterPhase driver

Fix direct casts of pointers to u32 in the InterPhase ATM driver.  These are
all arguments being passed to printk() calls.  So drop the cast and change the
%x to a %p.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>