selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS

This makes devlink_rate_tc_bw.py present in the Makefile under the same
directory.

Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-2-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/drivers/net/hw/Makefile

@@ -20,6 +20,7 @@ TEST_GEN_FILES := \
 TEST_PROGS = \
 	csum.py \
 	devlink_port_split.py \
+	devlink_rate_tc_bw.py \
 	devmem.py \
 	ethtool.sh \
 	ethtool_extended_state.sh \