soc/intel/quark: Switch to using serial routines for FSP

Switch from passing FSP the serial port address to passing FSP the
serial port output routine.  This enables coreboot to use any UART in
the system and also log the FSP output.

TEST=Build and run on Galileo Gen2

Change-Id: I67d820ea0360a3188480455dd2595be7f2debd5c
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/16105
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
4 files changed