ROMCC boards: Fix builds with CBMEM console, timestamps or usbdebug

These features depend on CAR_GLOBAL region, which is not available
when romstage is built with ROMCC. Exclude these from romstage, keep
them available for ramstage.

A follow-up patch will fix the dependencies and allows enabling these
features in menuconfig.

Change-Id: I9de5ad41ea733655a3fbdc734646f818e39cc471
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3919
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/arch/x86/lib/romcc_console.c

@@ -46,9 +46,6 @@ static void __console_tx_byte(unsigned char byte)
 #if CONFIG_CONSOLE_NE2K
 	ne2k_append_data_byte(byte, CONFIG_CONSOLE_NE2K_IO_PORT);
 #endif
-#if CONFIG_CONSOLE_CBMEM
-	cbmemc_tx_byte(byte);
-#endif
 }
 
 static void __console_tx_nibble(unsigned nibble)