fsp_baytrail: Add the default FSP location

The default FSP location needs to be in the chipset, not the mainboard.
This was removed from the Bayley Bay mainboard in patch 41ea7230f7
reviewed at http://review.coreboot.org/#/c/5982/

Change-Id: Ia26ed34e1401cbd2303166628e7a4e357d79c874
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/5985
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Tested-by: build bot (Jenkins)

src/soc/intel/fsp_baytrail/fsp/Kconfig

@@ -29,3 +29,13 @@ config FSP_FILE
 	help
 	  The path and filename of the Intel FSP binary for this platform.
 
+config FSP_LOC
+	hex "Intel FSP Binary location in CBFS"
+	default 0xfffc0000
+	help
+	  The location in CBFS that the FSP is located. This must match the
+	  value that is set in the FSP binary.  If the FSP needs to be moved,
+	  rebase the FSP with the Intel's BCT (tool).
+
+	  The Bay Trail FSP is built with a preferred base address of
+	  0xFFFC0000.