qemu: add x86 cpu

This patch adds a qemu x86 cpu chip.  It has no initialization function
as this isn't needed on virtual hardware.  A virtual machine can have
pretty much any CPU: qemu emulates a wide range of x86 CPUs (try 'qemu
-cpu ? for a list), also with 'qemu -cpu host' the guest will see a cpu
which is (almost) identical to the one on the host machine.  So I've
added X86_VENDOR_ANY as wildcard match for the cpu_table.

Change-Id: Ib01210694b09702e41ed806f31d0033e840a863f
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: http://review.coreboot.org/3344
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/cpu/Kconfig

@@ -14,6 +14,7 @@ if ARCH_X86
 source src/cpu/amd/Kconfig
 source src/cpu/intel/Kconfig
 source src/cpu/via/Kconfig
+source src/cpu/qemu-x86/Kconfig
 source src/cpu/x86/Kconfig
 
 config CACHE_AS_RAM