sysreset: Mark driver probe functions as static

These driver probe functions are not (and should not be) called from
outside the respective driver source files. Therefore, the functions
should be marked static.

Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/sysreset/sysreset_gpio.c b/drivers/sysreset/sysreset_gpio.c
index 680b759..dfca10c 100644
--- a/drivers/sysreset/sysreset_gpio.c
+++ b/drivers/sysreset/sysreset_gpio.c
@@ -33,7 +33,7 @@
 	.request = gpio_reboot_request,
 };
 
-int gpio_reboot_probe(struct udevice *dev)
+static int gpio_reboot_probe(struct udevice *dev)
 {
 	struct gpio_reboot_priv *priv = dev_get_priv(dev);
 
diff --git a/drivers/sysreset/sysreset_resetctl.c b/drivers/sysreset/sysreset_resetctl.c
index c039521..25bd5c9 100644
--- a/drivers/sysreset/sysreset_resetctl.c
+++ b/drivers/sysreset/sysreset_resetctl.c
@@ -26,7 +26,7 @@
 	.request = resetctl_reboot_request,
 };
 
-int resetctl_reboot_probe(struct udevice *dev)
+static int resetctl_reboot_probe(struct udevice *dev)
 {
 	struct resetctl_reboot_priv *priv = dev_get_priv(dev);
 
diff --git a/drivers/sysreset/sysreset_syscon.c b/drivers/sysreset/sysreset_syscon.c
index 28fdfb0..525faf2 100644
--- a/drivers/sysreset/sysreset_syscon.c
+++ b/drivers/sysreset/sysreset_syscon.c
@@ -39,7 +39,7 @@
 	.request = syscon_reboot_request,
 };
 
-int syscon_reboot_probe(struct udevice *dev)
+static int syscon_reboot_probe(struct udevice *dev)
 {
 	struct syscon_reboot_priv *priv = dev_get_priv(dev);
 	int err;
diff --git a/drivers/sysreset/sysreset_watchdog.c b/drivers/sysreset/sysreset_watchdog.c
index 0dc2d8b..c7ae368 100644
--- a/drivers/sysreset/sysreset_watchdog.c
+++ b/drivers/sysreset/sysreset_watchdog.c
@@ -29,7 +29,7 @@
 	.request = wdt_reboot_request,
 };
 
-int wdt_reboot_probe(struct udevice *dev)
+static int wdt_reboot_probe(struct udevice *dev)
 {
 	struct wdt_reboot_priv *priv = dev_get_priv(dev);
 	int err;