lib/rmodule: export parameters in struct rmod_stage_load

In order for a caller to utilize an rmodule's parameters section
after calling rmodule_stage_load() export the rmodule's parameter
pointer in struct rmod_stage_load.

Change-Id: I9cd51652cf8cdb3fae773256989851638aa1a60f
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/14139
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>

src/include/rmodule.h

@@ -55,6 +55,7 @@ struct prog;
 struct rmod_stage_load {
 	uint32_t cbmem_id;
 	struct prog *prog;
+	void *params;
 };
 
 /* Both of the following functions return 0 on success, -1 on error. */