mmc-utils: ffu: Add optional chunk-size argument

Normally one would like to perform ffu using the largest possible chunk.
However, since the ffu-timeout is vendor specific, there are times in
which smaller chunks would lead to a more robust ffu process.  Allow
this via an additional optional argument.

Tested-by: Lund Austin <Austin.Lund@garmin.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20230625103814.105-7-avri.altman@wdc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2 files changed