doc: android: avb: sync usage details

Sync usage info with the one cmd/avb.c.

Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240209192045.3961832-8-igor.opaniuk@foundries.io
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
1 file changed