drivers: net: Mark functions as static in 3945-debug.c

This patch marks the function il3945_ucode_rx_stats_read(),
il3945_ucode_tx_stats_read() and il3945_ucode_general_stats_read() in
3945-debug.c as static because they are not used outside this file.

Thus, it also removes the following warnings in
wireless/iwlegacy/3945-debug.c:

drivers/net/wireless/iwlegacy/3945-debug.c:52:1: warning: no previous prototype for ‘il3945_ucode_rx_stats_read’ [-Wmissing-prototypes]
drivers/net/wireless/iwlegacy/3945-debug.c:317:1: warning: no previous prototype for ‘il3945_ucode_tx_stats_read’ [-Wmissing-prototypes]
drivers/net/wireless/iwlegacy/3945-debug.c:407:1: warning: no previous prototype for ‘il3945_ucode_general_stats_read’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlegacy/3945-debug.c

@@ -48,7 +48,7 @@ il3945_stats_flag(struct il_priv *il, char *buf, int bufsz)
 	return p;
 }
 
-ssize_t
+static ssize_t
 il3945_ucode_rx_stats_read(struct file *file, char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
@@ -313,7 +313,7 @@ il3945_ucode_rx_stats_read(struct file *file, char __user *user_buf,
 	return ret;
 }
 
-ssize_t
+static ssize_t
 il3945_ucode_tx_stats_read(struct file *file, char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
@@ -403,7 +403,7 @@ il3945_ucode_tx_stats_read(struct file *file, char __user *user_buf,
 	return ret;
 }
 
-ssize_t
+static ssize_t
 il3945_ucode_general_stats_read(struct file *file, char __user *user_buf,
 				size_t count, loff_t *ppos)
 {