iwlwifi: use dev_printk instead of dev_dbg for debug logs

When calling IWL_DEBUG_*() dev_dbg() is currently used, and this
could result in the log being ignored no matter the internal
loglevel, since dev_dbg() may get turned on or off based on the
dynamic debug mechanism.

Replace the dev_dbg() with dev_printk() since dynamic printing
is pointless as we use our own debug level mechanism and there
is just a single dev_dbg() call in the code.
Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
[rephrase commit message a bit]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/iwl-debug.c

@@ -61,8 +61,6 @@
  *
  *****************************************************************************/
 
-#define DEBUG
-
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/export.h>
@@ -128,8 +126,8 @@ void __iwl_dbg(struct device *dev,
 #ifdef CONFIG_IWLWIFI_DEBUG
 	if (iwl_have_debug_level(level) &&
 	    (!limit || net_ratelimit()))
-		dev_dbg(dev, "%c %s %pV", in_interrupt() ? 'I' : 'U',
-			function, &vaf);
+		dev_printk(KERN_DEBUG, dev, "%c %s %pV",
+			   in_interrupt() ? 'I' : 'U', function, &vaf);
 #endif
 	trace_iwlwifi_dbg(level, in_interrupt(), function, &vaf);
 	va_end(args);