octeontx2-pf: Reuse Transmit queue/Send queue index of HTB class

octeontx2-pf: Reuse Transmit queue/Send queue index of HTB class

Real number of Transmit queues are incremented when user enables HTB
class and vice versa. Depending on SKB priority driver returns transmit
queue (Txq). Transmit queues and Send queues are one-to-one mapped.

In few scenarios, Driver is returning transmit queue value which is
greater than real number of transmit queue and Stack detects this as
error and overwrites transmit queue value.

For example
user has added two classes and real number of queues are incremented
accordingly
- tc class add dev eth1 parent 1: classid 1:1 htb
      rate 100Mbit ceil 100Mbit prio 1 quantum 1024
- tc class add dev eth1 parent 1: classid 1:2 htb
      rate 100Mbit ceil 200Mbit prio 7 quantum 1024

now if user deletes the class with id 1:1, driver decrements the real
number of queues
- tc class del dev eth1 classid 1:1

But for the class with id 1:2, driver is returning transmit queue
value which is higher than real number of transmit queue leading
to below error

eth1 selects TX queue x, but real number of TX queues is x

This patch solves the problem by assigning deleted class transmit
queue/send queue to active class.

Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240508070935.11501-1-hkelam@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>