Revert "Remove FSP Rangeley SOC and mohonpeak board support"

This chip is still being used and should not have been deleted.  It's
a current intel chip, and doesn't even require an ME binary.

This reverts commit 959478a763.

Change-Id: I78594871f87af6e882a245077b59727e15f8021a
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/11860
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/vendorcode/intel/Kconfig

@@ -20,6 +20,7 @@
 config FSP_VENDORCODE_HEADER_PATH
 	string
 	default "fsp1_0/baytrail" if SOC_INTEL_FSP_BAYTRAIL
+	default "fsp1_0/rangeley" if CPU_INTEL_FSP_MODEL_406DX
 
 config UEFI_2_4_BINDING
 	def_bool n