staging: r8188eu: use mgmt to set the addba resp timeout

Use the mgmt struct to set the addba response timeout. Copy the timeout
from the saved addba request. The timeout field is already le16, we don't
have to convert the endianness.

Tested-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220602193726.280922-4-martin@kaiser.cx


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