scripts: get_abi.pl: Fix typo in help message

Fix misspelled word in the script. (s/COMAND/COMMAND/).

Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/1ff3605db3dead41bbde33fbbff6754900eceead.1645789205.git.michal.simek@xilinx.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>