ROM will erase the region a partition is in as soon as it receives the
first bit of the data that is in the partition. For large partitions it
takes more than 5 seconds to erase which is a hard-coded limit in
dfu-utils.
This splits large binaries and adds them by chunks which should avoid
timing-out during flashing.
Closes https://github.com/espressif/esp-idf/issues/6999
