selftests: net: ksft: replace 95 with errno.EOPNOTSUPP

Petr suggested to use errno.EOPNOTSUPP instead of hard-coded 95
in the new test case. Adjust existing ones to match this style.
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20240802000309.2368-3-sdf@fomichev.meSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py

 #!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0
 
+import errno
 import time
 import os
 from lib.py import ksft_run, ksft_exit, ksft_pr
@@ -61,7 +62,7 @@ def test_pp_alloc(cfg, netdevnl):
     try:
         stats = get_stats()
     except NlError as e:
-        if e.nl_msg.error == -95:
+        if e.nl_msg.error == -errno.EOPNOTSUPP:
             stats = {}
         else:
             raise

tools/testing/selftests/drivers/net/stats.py

@@ -20,7 +20,7 @@ def check_pause(cfg) -> None:
     try:
         ethnl.pause_get({"header": {"dev-index": cfg.ifindex}})
     except NlError as e:
-        if e.error == 95:
+        if e.error == errno.EOPNOTSUPP:
             raise KsftXfailEx("pause not supported by the device")
         raise
 
@@ -35,7 +35,7 @@ def check_fec(cfg) -> None:
     try:
         ethnl.fec_get({"header": {"dev-index": cfg.ifindex}})
     except NlError as e:
-        if e.error == 95:
+        if e.error == errno.EOPNOTSUPP:
             raise KsftXfailEx("FEC not supported by the device")
         raise
 
@@ -120,7 +120,7 @@ def qstat_by_ifindex(cfg) -> None:
     # loopback has no stats
     with ksft_raises(NlError) as cm:
         netfam.qstats_get({"ifindex": 1}, dump=True)
-    ksft_eq(cm.exception.nl_msg.error, -95)
+    ksft_eq(cm.exception.nl_msg.error, -errno.EOPNOTSUPP)
     ksft_eq(cm.exception.nl_msg.extack['bad-attr'], '.ifindex')
 
     # Try to get stats for lowest unused ifindex but not 0