src/cpu: Capitalize CPU

Change-Id: I58d5c16de796a91fa14d8db78722024266c09a94
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15934
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>

src/cpu/amd/pi/00630F01/model_15_init.c

@@ -79,7 +79,7 @@ static void model_15_init(device_t dev)
 	}
 
 
-	/* Enable the local cpu apics */
+	/* Enable the local CPU apics */
 	setup_lapic();
 
 #if CONFIG_LOGICAL_CPUS

src/cpu/amd/pi/00660F01/model_15_init.c

@@ -94,7 +94,7 @@ static void model_15_init(device_t dev)
 	}
 
 
-	/* Enable the local cpu apics */
+	/* Enable the local CPU apics */
 	setup_lapic();
 
 #if CONFIG_LOGICAL_CPUS

src/cpu/amd/pi/00730F01/model_16_init.c

@@ -77,7 +77,7 @@ static void model_16_init(device_t dev)
 	}
 
 
-	/* Enable the local cpu apics */
+	/* Enable the local CPU apics */
 	setup_lapic();
 
 #if CONFIG_LOGICAL_CPUS