Subject: libertas link error due to gcc `smartness'

Some versions of gcc replace strstr() calls with a single-character `needle'
parameter by strchr() behind our back. This causes a link error if strchr() is
defined as an inline function:

| drivers/built-in.o: In function `libertas_parse_chan':
| linux/drivers/net/wireless/libertas/debugfs.c:209: undefined reference to `strchr'
| drivers/built-in.o: In function `libertas_parse_ssid':
| linux/drivers/net/wireless/libertas/debugfs.c:260: undefined reference to `strchr'

Also include <linux/string.h>, because this file calls lots of str*() routines.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
Due to the lack of hardware, I could not test the functionality of this change.

 drivers/net/wireless/libertas/debugfs.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c
@@ -3,6 +3,7 @@
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
+#include <linux/string.h>
 #include <net/iw_handler.h>
 
 #include "dev.h"
@@ -205,7 +206,7 @@ static int libertas_parse_chan(char *buf
 	if (!start)
 		return -EINVAL;
 	start += 5;
-	end = strstr(start, " ");
+	end = strchr(start, ' ');
 	if (!end)
 		end = buf + count;
 	hold = kzalloc((end - start)+1, GFP_KERNEL);
@@ -256,7 +257,7 @@ static void libertas_parse_ssid(char *bu
 	if (!hold)
 		return;
 	hold += 5;
-	end = strstr(hold, " ");
+	end = strchr(hold, ' ');
 	if (!end)
 		end = buf + count - 1;