src/soc: Capitalize CPU, ACPI, RAM and ROM

Change-Id: I7f0d3400126d593bad8e78f95e6b9a378463b4ce
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15963
Tested-by: build bot (Jenkins)
Reviewed-by: Omar Pakker
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/quark/tsc_freq.c

@@ -20,7 +20,7 @@
 
 static unsigned long bus_freq_khz(void)
 {
-	/* cpu freq = 400 MHz */
+	/* CPU freq = 400 MHz */
 	return 400 * 1000;
 }