counter: intel-qep: Depend on X86

Limit the Intel counter driver to X86, it doesn't
make sense to build it for all arches if the counter
subsystem is enabled.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20230108074750.443705-2-pbrobinson@gmail.com/


Signed-off-by: William Breathitt Gray <william.gray@linaro.org>