Patch merged into coreboot/master: amd/thatcher: Removed #include early_serial.c from romstage

the following patch was just integrated into master:
commit bc839fba3d4fd44d3d7b2dcfafc32bccf2af9c94
Author: Antonello Dettori 
Date:   Thu Mar 3 16:25:35 2016 +0000

amd/thatcher: Removed #include early_serial.c from romstage

Remove dependency on early_serial.c and instead use the
    Super I/O's header to access the functions needed.

Change-Id: I9edf7fc2501aa832106dda9213e702dbcc1200b4
    Signed-off-by: Antonello Dettori 
    Reviewed-on: https://review.coreboot.org/13887
    Reviewed-by: Martin Roth 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/13887 for details.

-gerrit