[coreboot] Can't build (for g505s) with crossgcc-x64 toolchain, builds fine with crossgcc-i386

[Mike Banon]

Here's a final part of coreboot build log for crossgcc-x64 build
attempt. This does not happen while building with crossgcc-i386, so
seems to be x64-only problem.

CC         romstage/lib/stack.o
    CC         romstage/lib/timestamp.o
    CC         romstage/lib/version.o
    CC         romstage/mainboard/lenovo/g505s/BiosCallOuts.o
    CC         romstage/mainboard/lenovo/g505s/OemCustomize.o
    CC         romstage/mainboard/lenovo/g505s/buildOpts.o
    CC         romstage/mainboard/lenovo/g505s/romstage.o
    CC         romstage/northbridge/amd/agesa/family15tn/dimmSpd.o
    CC         romstage/northbridge/amd/agesa/family15tn/state_machine.o
    CC         romstage/southbridge/amd/agesa/hudson/early_setup.o
    CC         romstage/southbridge/amd/agesa/hudson/imc.o
    CC         romstage/southbridge/amd/agesa/hudson/ramtop.o
    CC         romstage/southbridge/amd/agesa/hudson/smbus.o
    CC         romstage/southbridge/amd/agesa/hudson/smbus_spd.o
    CC         romstage/vendorcode/amd/agesa/common/agesa-entry.o
    LINK       cbfs/fallback/romstage.debug
/home/mikeb/coreboot/util/crossgcc/xgcc/bin/x86_64-elf-ld.bfd:
build/romstage/console/vtxprintf.o: in function `number':
/home/mikeb/coreboot/src/console/vtxprintf.c:104: undefined reference
to `__udivmoddi4'
/home/mikeb/coreboot/util/crossgcc/xgcc/bin/x86_64-elf-ld.bfd:
build/romstage/lib/gcc.o: in function `__wrap___udivdi3':
/home/mikeb/coreboot/src/lib/gcc.c:33: undefined reference to `__udivdi3'
src/arch/x86/Makefile.inc:251: recipe for target
'build/cbfs/fallback/romstage.debug' failed
make: *** [build/cbfs/fallback/romstage.debug] Error 1