mb/asus/p5gc-mx: Drop HAVE_MP_TABLE

The weak implementation of write_smp_table() is not useful
without DRIVERS_GENERIC_IOAPIC and related entries in
devicetree.cb. No interrupt routing entries are present
in the generated MP table.

Change-Id: Ib50a7656cef40d0d3ffcc408cc0858c1dae7b9e5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69487
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/asus/p5gc-mx/Kconfig

@@ -11,7 +11,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SUPERIO_WINBOND_W83627DHG
 	select HAVE_OPTION_TABLE
 	select HAVE_CMOS_DEFAULT
-	select HAVE_MP_TABLE
 	select HAVE_ACPI_TABLES
 	select HAVE_ACPI_RESUME
 	select BOARD_ROMSIZE_KB_512