boot: Add vendor defined TLV ranges
boot: Add vendor defined TLV ranges

This patch adds comments to reserve off a portion of the available TLV range
for use by vendors for proprietary TLV types.

Signed-off-by: Andy Gross <4ba87047449f5700e8758e3b1af36e94376c2fff@juul.com>

ATmobica/mcuboot,ATmobica/mcuboot,utzig/mcuboot,utzig/mcuboot,utzig/mcuboot,ATmobica/mcuboot,utzig/mcuboot,runtimeco/mcuboot,runtimeco/mcuboot,runtimeco/mcuboot,runtimeco/mcuboot,ATmobica/mcuboot,runtimeco/mcuboot,ATmobica/mcuboot,utzig/mcuboot