wifi: Use kstrtobool() instead of strtobool()

strtobool() is the same as kstrtobool().
However, the latter is more used within the kernel.

In order to remove strtobool() and slightly simplify kstrtox.h, switch to
the other function name.

While at it, include the corresponding header file (<linux/kstrtox.h>)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/1ff34549af5ad6f7c80d5b9e11872b5499065fc1.1667336095.git.christophe.jaillet@wanadoo.fr

drivers/net/wireless/ath/ath10k/debug.c

@@ -10,6 +10,7 @@
 #include <linux/vmalloc.h>
 #include <linux/crc32.h>
 #include <linux/firmware.h>
+#include <linux/kstrtox.h>
 
 #include "core.h"
 #include "debug.h"
@@ -1975,7 +1976,7 @@ static ssize_t ath10k_write_btcoex(struct file *file,
 
 	buf[buf_size] = '\0';
 
-	if (strtobool(buf, &val) != 0)
+	if (kstrtobool(buf, &val) != 0)
 		return -EINVAL;
 
 	if (!ar->coex_support)
@@ -2113,7 +2114,7 @@ static ssize_t ath10k_write_peer_stats(struct file *file,
 
 	buf[buf_size] = '\0';
 
-	if (strtobool(buf, &val) != 0)
+	if (kstrtobool(buf, &val) != 0)
 		return -EINVAL;
 
 	mutex_lock(&ar->conf_mutex);

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -20,6 +20,7 @@
 #include <linux/etherdevice.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
+#include <linux/kstrtox.h>
 #include <linux/leds.h>
 #include <linux/completion.h>
 #include <linux/time.h>

drivers/net/wireless/ath/ath9k/tx99.c

@@ -189,7 +189,7 @@ static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
 
 	buf[len] = '\0';
 
-	if (strtobool(buf, &start))
+	if (kstrtobool(buf, &start))
 		return -EINVAL;
 
 	mutex_lock(&sc->mutex);

drivers/net/wireless/marvell/mwifiex/debugfs.c

@@ -874,7 +874,7 @@ mwifiex_timeshare_coex_write(struct file *file, const char __user *ubuf,
 	if (copy_from_user(&kbuf, ubuf, min_t(size_t, sizeof(kbuf) - 1, count)))
 		return -EFAULT;
 
-	if (strtobool(kbuf, &timeshare_coex))
+	if (kstrtobool(kbuf, &timeshare_coex))
 		return -EINVAL;
 
 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_ROBUST_COEX,

drivers/net/wireless/marvell/mwifiex/main.h

@@ -10,6 +10,7 @@
 
 #include <linux/completion.h>
 #include <linux/kernel.h>
+#include <linux/kstrtox.h>
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/semaphore.h>