rsi: make rsi_dbg a regular function

This is to address reports of this:

In file included from drivers/net/wireless/rsi/rsi_mgmt.h:22:0,
                 from drivers/net/wireless/rsi/rsi_91x_core.c:17:
drivers/net/wireless/rsi/rsi_91x_core.c: In function 'rsi_dbg':
drivers/net/wireless/rsi/rsi_main.h:44:20: error: function 'rsi_dbg' can never be inlined because it uses variable argument lists
 static inline void rsi_dbg(u32 zone, const char *fmt, ...)

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h
index bebdc2a..e97e6ad 100644
--- a/drivers/net/wireless/rsi/rsi_main.h
+++ b/drivers/net/wireless/rsi/rsi_main.h
@@ -40,21 +40,7 @@
 #define FSM_MAC_INIT_DONE               6
 
 extern u32 rsi_zone_enabled;
-
-static inline void rsi_dbg(u32 zone, const char *fmt, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	va_start(args, fmt);
-
-	vaf.fmt = fmt;
-	vaf.va = &args;
-
-	if (zone & rsi_zone_enabled)
-		pr_info("%pV", &vaf);
-	va_end(args);
-}
+extern void rsi_dbg(u32 zone, const char *fmt, ...);
 
 #define RSI_MAX_VIFS                    1
 #define NUM_EDCA_QUEUES                 4