x86/apic: Fix spelling mistake: "symmectic" -> "symmetric"

Trivial fix to spelling mistakes in pr_info messages

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Link: https://lkml.kernel.org/r/20170927102223.31920-1-colin.king@canonical.com

arch/x86/kernel/apic/apic.c

@@ -1296,11 +1296,11 @@ void __init apic_intr_mode_init(void)
 		default_setup_apic_routing();
 		break;
 	case APIC_SYMMETRIC_IO:
-		pr_info("APIC: Switch to symmectic I/O mode setup\n");
+		pr_info("APIC: Switch to symmetric I/O mode setup\n");
 		default_setup_apic_routing();
 		break;
 	case APIC_SYMMETRIC_IO_NO_ROUTING:
-		pr_info("APIC: Switch to symmectic I/O mode setup in no SMP routine\n");
+		pr_info("APIC: Switch to symmetric I/O mode setup in no SMP routine\n");
 		break;
 	}