drivers/isdn/hardware/mISDN: fix sparse warnings: make symbols static

Fix this sparse warnings:
  drivers/isdn/hardware/mISDN/hfcpci.c:59:19: warning: symbol 'hfc_tl' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcpci.c:60:9: warning: symbol 'hfc_jiffies' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.h:201:6: warning: symbol 'conf_str' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.h:319:12: warning: symbol 'HFC_TE_LAYER1_STATES' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.h:331:12: warning: symbol 'HFC_NT_LAYER1_STATES' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.c:38:12: warning: symbol 'hfcsusb_rev' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.c:978:1: warning: symbol 'fill_isoc_urb' was not declared. Should it be static?
  drivers/isdn/hardware/mISDN/hfcsusb.c:1724:1: warning: symbol 'setup_hfcsusb' was not declared. Should it be static?

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.h b/drivers/isdn/hardware/mISDN/hfcsusb.h
index 098486b..43efe73 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.h
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.h
@@ -198,7 +198,7 @@
 };
 
 /* string description of chosen config */
-char *conf_str[] = {
+static char *conf_str[] = {
 	"4 Interrupt IN + 3 Isochron OUT",
 	"3 Interrupt IN + 3 Isochron OUT",
 	"4 Isochron IN + 3 Isochron OUT",
@@ -316,7 +316,7 @@
 #define HFC_MAX_TE_LAYER1_STATE 8
 #define HFC_MAX_NT_LAYER1_STATE 4
 
-const char *HFC_TE_LAYER1_STATES[HFC_MAX_TE_LAYER1_STATE + 1] = {
+static const char *HFC_TE_LAYER1_STATES[HFC_MAX_TE_LAYER1_STATE + 1] = {
 	"TE F0 - Reset",
 	"TE F1 - Reset",
 	"TE F2 - Sensing",
@@ -328,7 +328,7 @@
 	"TE F8 - Lost framing",
 };
 
-const char *HFC_NT_LAYER1_STATES[HFC_MAX_NT_LAYER1_STATE + 1] = {
+static const char *HFC_NT_LAYER1_STATES[HFC_MAX_NT_LAYER1_STATE + 1] = {
 	"NT G0 - Reset",
 	"NT G1 - Deactive",
 	"NT G2 - Pending activation",