fwu: add config symbols for enabling FWU metadata versions

Support has been added for version 2 of the FWU metadata
structure. Add config symbols to enable either of the two versions.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Tested-by: Michal Simek <michal.simek@amd.com>
2 files changed