sunxi: Kconfig: rename non-existent SUN50I_A64 config symbol

There is no "CONFIG_MACH_SUN50I_A64" in upstream U-Boot, so fix
the name to prevent the option to be enabled.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
1 file changed