Enable SMI on M2V-MX SE

Finally the SMI routines are in good shape on AMD, lets enable this and later
implement ACPI on/off SMI commands.

Change-Id: I9848a7be908780353eead30c16fd2df8ea48f77e
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: http://review.coreboot.org/83
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/asus/m2v-mx_se/Kconfig

@@ -30,6 +30,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select SUPERIO_ITE_IT8712F
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_TABLES
+	select HAVE_SMI_HANDLER
 	select BOARD_ROMSIZE_KB_512
 	select RAMINIT_SYSINFO
 	select VGA