dmaengine: ti: k3-psil-j721s2: Add PSI-L thread map for main CPSW2G

Add PSI-L thread map for main CPSW2G.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20230511034704.656155-1-s-vadapalli@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>