arm64: remove redundant "psci:" prefixes

Since 652af899799354049b273af897b798b8f03fdd88 "arm64: factor out spin-table
boot method" psci prefix's been introduced. We have a common pr_fmt, so clean
them up.

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/kernel/psci.c

@@ -251,7 +251,7 @@ static int cpu_psci_cpu_boot(unsigned int cpu)
 {
 	int err = psci_ops.cpu_on(cpu_logical_map(cpu), __pa(secondary_entry));
 	if (err)
-		pr_err("psci: failed to boot CPU%d (%d)\n", cpu, err);
+		pr_err("failed to boot CPU%d (%d)\n", cpu, err);
 
 	return err;
 }
@@ -278,7 +278,7 @@ static void cpu_psci_cpu_die(unsigned int cpu)
 
 	ret = psci_ops.cpu_off(state);
 
-	pr_crit("psci: unable to power off CPU%u (%d)\n", cpu, ret);
+	pr_crit("unable to power off CPU%u (%d)\n", cpu, ret);
 }
 #endif