net: mana: Use mana_cleanup_port_context() for rxq cleanup

net: mana: Use mana_cleanup_port_context() for rxq cleanup

To cleanup rxqs in port context structures, instead of duplicating the
code, use existing function mana_cleanup_port_context() which does
the exact cleanup that's needed.

Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Heng Qi <hengqi@linux.alibaba.com>
Link: https://lore.kernel.org/r/1718349548-28697-1-git-send-email-shradhagupta@linux.microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>