vendorcode/intel/fsp1_0/broadwell_de: Use FSP from 3rdparty/fsp

Default to FSP binary and headers shiped in 3rdparty/fsp.

* Drop headers and code from vendorcode/intel/fsp1_0/broadwell_de
* Select HAVE_FSP_BIN to build test the platform
* Fetch FSP repo as submodule
* Make FSP_HEADER_PATH known from FSP2.0 useable on FSP1.0
* Introduce FSP_SRC_PATH for FSP source file
* Add sane defaults for FSP_FILE

Tested on wedge100s.

Change-Id: I46f201218d19cf34c43a04f57458f474d8c3340d
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/30742
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
diff --git a/Makefile.inc b/Makefile.inc
index 0c7cf8a..ddebe5e 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -198,6 +198,11 @@
 ifeq ($(CONFIG_PLATFORM_USES_FSP2_0),y)
 forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/fsp))
 endif
+ifeq ($(CONFIG_PLATFORM_USES_FSP1_0),y)
+ifeq ($(CONFIG_SOC_INTEL_FSP_BROADWELL_DE),y)
+forgetthis:=$(if $(GIT),$(shell git submodule update --init --checkout 3rdparty/fsp))
+endif
+endif
 endif
 UPDATED_SUBMODULES:=1
 COREBOOT_EXPORTS += UPDATED_SUBMODULES