powerpc/512x: Make mpc512x_select_reset_compat() static

mpc512x_select_reset_compat() is only used in the file it
is defined.

Make it static.

Move mpc512x_restart_init() after mpc512x_select_reset_compat().

Signed-off-by: Christophe Leroy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://msgid.link/36a19e13[e-mail]

arch/powerpc/platforms/512x/mpc512x.h

···
 extern void __init mpc512x_setup_arch(void);
 extern int __init mpc5121_clk_init(void);
 const char *__init mpc512x_select_psc_compat(void);
-const char *__init mpc512x_select_reset_compat(void);
 extern void __noreturn mpc512x_restart(char *cmd);
 
 #endif				/* __MPC512X_H__ */

arch/powerpc/platforms/512x/mpc512x_shared.c

···
 
 static struct mpc512x_reset_module __iomem *reset_module_base;
 
-static void __init mpc512x_restart_init(void)
-{
-	struct device_node *np;
-	const char *reset_compat;
-
-	reset_compat = mpc512x_select_reset_compat();
-	np = of_find_compatible_node(NULL, NULL, reset_compat);
-	if (!np)
-		return;
-
-	reset_module_base = of_iomap(np, 0);
-	of_node_put(np);
-}
-
 void __noreturn mpc512x_restart(char *cmd)
 {
 	if (reset_module_base) {
···
 	return NULL;
 }
 
-const char *__init mpc512x_select_reset_compat(void)
+static const char *__init mpc512x_select_reset_compat(void)
 {
 	if (of_machine_is_compatible("fsl,mpc5121"))
 		return "fsl,mpc5121-reset";
···
 
 		iounmap(psc);
 	}
+}
+
+static void __init mpc512x_restart_init(void)
+{
+	struct device_node *np;
+	const char *reset_compat;
+
+	reset_compat = mpc512x_select_reset_compat();
+	np = of_find_compatible_node(NULL, NULL, reset_compat);
+	if (!np)
+		return;
+
+	reset_module_base = of_iomap(np, 0);
+	of_node_put(np);
 }
 
 void __init mpc512x_init_early(void)