oe-time-dd-test.sh: add options and refactor
Options:
-c | --count <amount> dd (transfer) <amount> KiB of data within specified timeout to detect latency.
Must enable -t option.
-t | --timeout <time> timeout in seconds for the <count> amount of data to be transferred.
-l | --log-only run the commands without performing the data transfer.
-h | --help show help
Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
