tree 41ff9b13d0d4f28ca8345d835d64bf36cee2e2b7
parent d8802deabde876b8faca2389cca7090d40dd530b
author Dominik Ermel <dominik.ermel@nordicsemi.no> 1623315609 +0000
committer Fabio Utzig <utzig@utzig.org> 1626695523 -0300

zephyr: Allow to select slot for DFU as image

The change alters Zephyr port of mcumgr to use "image" parameter,
from update packet, to identify slot the update should be written to.
The number of available images/slots have also been extended with
image_2 and image_3.
WARNING: Due to mcumgr always sending "erase" command, which is
hardcoded to erase slot number 1, to upload to slot > 2, the -e
switch to mcumgr, which means no erase, image upload is required;
otherwise innocent slot 1 will be erased while other slot is uploaded.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>