da1469x: use uint16 TLV tag
da1469x: use uint16 TLV tag

mcuboot: d13318a14f99a5a3947bedc980020ec73800aaeb
updates the tag type to uint16_t. Use the same.

Signed-off-by: Naveen Kaje <79e427f88b1293e6ef90566b3bd0a85565336125@juul.com>

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core