platform/x86/intel/ifs: Add CPU_SUP_INTEL dependency

The driver is using functions from a compilation unit which is enabled
by CONFIG_CPU_SUP_INTEL. Add that dependency to Kconfig explicitly
otherwise:

  drivers/platform/x86/intel/ifs/load.o: in function `ifs_load_firmware':
  load.c:(.text+0x3b8): undefined reference to `intel_cpu_collect_info'

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/YoZay8YR0zRGyVu+@zn.tnic


Signed-off-by: Hans de Goede <hdegoede@redhat.com>