src/cpu: Capitalize CPU, APIC and IOAPIC typo fix

Change-Id: I82e0736dc6b44cfcc57cdfdc786c85c4b6882260
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16276
Tested-by: build bot (Jenkins)
Reviewed-by: Omar Pakker

src/cpu/intel/model_6fx/model_6fx_init.c

@@ -177,7 +177,7 @@ static void model_6fx_init(struct device *cpu)
 	/* Setup Page Attribute Tables (PAT) */
 	// TODO set up PAT
 
-	/* Enable the local CPU apics */
+	/* Enable the local CPU APICs */
 	setup_lapic();
 
 	/* Enable virtualization */