src/cpu: Capitalize ROM and RAM

Change-Id: I103167a0c39627bcd2ca1d0d4288eb5df02a6cd2
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15935
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/cpu/amd/agesa/cache_as_ram.inc

@@ -80,7 +80,7 @@ cache_as_ram_setup:
   movl    $0xc00000e3, 0x18(%edi)
   movl    %eax, 0x1c(%edi)
 
-  # load rom based identity mapped page tables
+  # load ROM based identity mapped page tables
   mov     %ecx, %eax
   mov     %eax, %cr3