dccp: make local variable static

Make DCCP module config variable static, only used in one file.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/ccids/lib/tfrc.c

@@ -8,7 +8,7 @@
 #include "tfrc.h"
 
 #ifdef CONFIG_IP_DCCP_TFRC_DEBUG
-bool tfrc_debug;
+static bool tfrc_debug;
 module_param(tfrc_debug, bool, 0644);
 MODULE_PARM_DESC(tfrc_debug, "Enable TFRC debug messages");
 #endif

net/dccp/ccids/lib/tfrc.h

@@ -21,7 +21,6 @@
 #include "packet_history.h"
 
 #ifdef CONFIG_IP_DCCP_TFRC_DEBUG
-extern bool tfrc_debug;
 #define tfrc_pr_debug(format, a...)	DCCP_PR_DEBUG(tfrc_debug, format, ##a)
 #else
 #define tfrc_pr_debug(format, a...)