pinctrl: Update ecmp-nexthop mac resolving L2 address. #4761

Job	Run time
linux rpm fedora	7m 3s
osx clang --disable-ssl	1m 52s
Prepare container	3m 17s
linux gcc --disable-ssl	2m 46s
linux clang --disable-ssl	2m 39s
linux gcc test -300	9m 23s
linux gcc test 301-600	6m 31s
linux gcc test 601- unstable	6m 41s
linux clang test sanitizers -300	12m 57s
linux clang test sanitizers 301-600	9m 12s
linux clang test sanitizers 601- unstable	11m 42s
linux gcc test -ljemalloc -300	10m 1s
linux gcc test -ljemalloc 301-600	6m 52s
linux gcc test -ljemalloc 601- unstable	6m 52s
linux gcc system-test-dpdk dpdk -100	16m 51s
linux gcc system-test-dpdk dpdk 101- unstable	15m 1s
linux gcc system-test-userspace -100	15m 45s
linux gcc system-test-userspace 101- unstable	13m 53s
linux gcc system-test -100	18m 22s
linux gcc system-test 101- unstable	18m 15s
linux clang system-test sanitizers -100	20m 10s
linux clang system-test sanitizers 101- unstable	20m 26s
linux x86 gcc --disable-ssl	2m 32s
	3h 59m 3s

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