intel/intel_chipset: Move IS_9XX below IS_GEN10.

No functional change. Just organizing the code
so it gets clear for future platforms.

Paulo deserves credits becuase he was the one
that just noticed this IS_9XX was in the wrong position
after CNL patches got introduced.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>