irqchip/gic: 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: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/755c4083122071bb27aa8ed5d98156a07bb63a39.1667336095.git.christophe.jaillet@wanadoo.fr

drivers/irqchip/irq-gic-v3.c

@@ -12,6 +12,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/irqdomain.h>
+#include <linux/kstrtox.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -1171,7 +1172,7 @@ static bool gicv3_nolpi;
 
 static int __init gicv3_nolpi_cfg(char *buf)
 {
-	return strtobool(buf, &gicv3_nolpi);
+	return kstrtobool(buf, &gicv3_nolpi);
 }
 early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg);
 

drivers/irqchip/irq-gic.c

@@ -19,6 +19,7 @@
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/kstrtox.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/list.h>
@@ -1332,7 +1333,7 @@ static bool gicv2_force_probe;
 
 static int __init gicv2_force_probe_cfg(char *buf)
 {
-	return strtobool(buf, &gicv2_force_probe);
+	return kstrtobool(buf, &gicv2_force_probe);
 }
 early_param("irqchip.gicv2_force_probe", gicv2_force_probe_cfg);