In the process of streamlining coreboot code and getting rid of unneeded ifdefs, drop a number of unneeded checks for the GNU C compiler. This also cleans up x86emu/types.h significantly by dropping all the duplicate types in there. Change-Id: I0bf289e149ed02e5170751c101adc335b849a410 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/3226 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins)