Staging: i4l: icn: prefer pr_* instead of printk

This patch replaces call to  printk with  appropriate pr_*
function thus addressing the following warning generated by the
checkpatch script:
Prefer [subsystem eg: netdev]_dbg([subsystem]dev, ... then
        dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
Signed-off-by: Harman Kalra <harman4linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/i4l/icn/icn.h

@@ -54,7 +54,7 @@ typedef struct icn_cdef {
 
 /* some useful macros for debugging */
 #ifdef ICN_DEBUG_PORT
-#define OUTB_P(v, p) {printk(KERN_DEBUG "icn: outb_p(0x%02x,0x%03x)\n", v, p); outb_p(v, p);}
+#define OUTB_P(v, p) {pr_debug("icn: outb_p(0x%02x,0x%03x)\n", v, p); outb_p(v, p);}
 #else
 #define OUTB_P outb
 #endif