net: ti: am65-cpsw-nuss: Remove comma after sentinel-entry in match-table

Since sentinel is the last entry and we do not expect further entries
following it, remove the comma.

Reviewed-by: Alexander Sverdlin <alex@sverdlin.org>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Link: https://patch.msgid.link/20260904043724.2955444-27-s-vadapalli@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>