[media] rc-core: don't use dynamic_pr_debug for IR_dprintk()

The hole point of IR_dprintk() is that, once a level is
given at debug parameter, all enabled IR parsers will show their
debug messages.

While converting it to dynamic_printk might be a good idea,
right now it just makes very hard to debug the drivers, as
one needs to both pass debug=1 or debug=2 to rc-core and
to use the dynamic printk to enable all the desired lines.

That doesn't make sense!

So, revert to the old way, as a single line is changed,
and the debug parameter will now work as expected.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

include/media/rc-core.h

@@ -26,7 +26,7 @@ extern int rc_core_debug;
 #define IR_dprintk(level, fmt, ...)				\
 do {								\
 	if (rc_core_debug >= level)				\
-		pr_debug("%s: " fmt, __func__, ##__VA_ARGS__);	\
+		printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
 } while (0)
 
 enum rc_driver_type {