atm: fix non-const printk argument

Change printk() argument to fix compiler warning.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/iphase.c b/drivers/atm/iphase.c
index e1c7611..78c9736 100644
--- a/drivers/atm/iphase.c
+++ b/drivers/atm/iphase.c
@@ -977,9 +977,7 @@
             else
                 pBuf += sprintf( pBuf, "." );
                 }
-        sprintf( pBuf, "\n" );
-        // SPrint(prntBuf);
-        printk(prntBuf);
+        printk("%s\n", prntBuf);
         count += col;
         pBuf = prntBuf;
     }