firmware: intel_stratix10_service: add depend on agilex

Add depend on Agilex for Intel Agilex SoC platform.

Signed-off-by: Richard Gong <richard.gong@intel.com>
Acked-by: Moritz Fischer <mdf@kernel.org>
Link: https://lore.kernel.org/r/1583428346-13307-3-git-send-email-richard.gong@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>