iproute2: update to 6.11.0

iproute2: update to 6.11.0

Release Notes:
https://lore.kernel.org/netdev/20240717090601.20b2871f@hermes.local/T/
https://lwn.net/Articles/990423/

Remove patch `401-bridge-vlan.c-bridge-vlan.c-fix-build-with-gcc-14-on.patch`
because it is upstream now.

Backport two patches to fix build problems in bridge/mst.c

Small size increase:
 38538 bin/packages/mips_24kc-old/base/devlink_6.9.0-r1_mips_24kc.ipk
  7713 bin/packages/mips_24kc-old/base/genl_6.9.0-r1_mips_24kc.ipk
 31875 bin/packages/mips_24kc-old/base/ip-bridge_6.9.0-r1_mips_24kc.ipk
187733 bin/packages/mips_24kc-old/base/ip-full_6.9.0-r1_mips_24kc.ipk
126538 bin/packages/mips_24kc-old/base/ip-tiny_6.9.0-r1_mips_24kc.ipk
  7619 bin/packages/mips_24kc-old/base/nstat_6.9.0-r1_mips_24kc.ipk
 20704 bin/packages/mips_24kc-old/base/rdma_6.9.0-r1_mips_24kc.ipk
 37607 bin/packages/mips_24kc-old/base/ss_6.9.0-r1_mips_24kc.ipk
158909 bin/packages/mips_24kc-old/base/tc-bpf_6.9.0-r1_mips_24kc.ipk
160459 bin/packages/mips_24kc-old/base/tc-full_6.9.0-r1_mips_24kc.ipk
135846 bin/packages/mips_24kc-old/base/tc-tiny_6.9.0-r1_mips_24kc.ipk
 38669 bin/packages/mips_24kc-new/base/devlink_6.11.0-r1_mips_24kc.ipk
  7719 bin/packages/mips_24kc-new/base/genl_6.11.0-r1_mips_24kc.ipk
 32676 bin/packages/mips_24kc-new/base/ip-bridge_6.11.0-r1_mips_24kc.ipk
188920 bin/packages/mips_24kc-new/base/ip-full_6.11.0-r1_mips_24kc.ipk
127313 bin/packages/mips_24kc-new/base/ip-tiny_6.11.0-r1_mips_24kc.ipk
  7612 bin/packages/mips_24kc-new/base/nstat_6.11.0-r1_mips_24kc.ipk
 21065 bin/packages/mips_24kc-new/base/rdma_6.11.0-r1_mips_24kc.ipk
 37726 bin/packages/mips_24kc-new/base/ss_6.11.0-r1_mips_24kc.ipk
158921 bin/packages/mips_24kc-new/base/tc-bpf_6.11.0-r1_mips_24kc.ipk
160510 bin/packages/mips_24kc-new/base/tc-full_6.11.0-r1_mips_24kc.ipk
136352 bin/packages/mips_24kc-new/base/tc-tiny_6.11.0-r1_mips_24kc.ipk

Link: https://github.com/openwrt/openwrt/pull/16589
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>