arm64: remove return value form psci_init()

psci_init() is written to return err code if something goes wrong. However,
the single user, setup_arch(), doesn't care about it. Moreover, every error
path is supplied with a clear message which is enough for pleasant debugging.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/include/asm/psci.h

@@ -14,6 +14,6 @@
 #ifndef __ASM_PSCI_H
 #define __ASM_PSCI_H
 
-int psci_init(void);
+void psci_init(void);
 
 #endif /* __ASM_PSCI_H */

arch/arm64/kernel/psci.c

@@ -176,22 +176,20 @@ static const struct of_device_id psci_of_match[] __initconst = {
 	{},
 };
 
-int __init psci_init(void)
+void __init psci_init(void)
 {
 	struct device_node *np;
 	const char *method;
 	u32 id;
-	int err = 0;
 
 	np = of_find_matching_node(NULL, psci_of_match);
 	if (!np)
-		return -ENODEV;
+		return;
 
 	pr_info("probing function IDs from device-tree\n");
 
 	if (of_property_read_string(np, "method", &method)) {
 		pr_warning("missing \"method\" property\n");
-		err = -ENXIO;
 		goto out_put_node;
 	}
 
@@ -201,7 +199,6 @@ int __init psci_init(void)
 		invoke_psci_fn = __invoke_psci_fn_smc;
 	} else {
 		pr_warning("invalid \"method\" property: %s\n", method);
-		err = -EINVAL;
 		goto out_put_node;
 	}
 
@@ -227,7 +224,7 @@ int __init psci_init(void)
 
 out_put_node:
 	of_node_put(np);
-	return err;
+	return;
 }
 
 #ifdef CONFIG_SMP