netdev: Always clear struct ifreq before ioctl. #2548

Job	Run time
linux deb no dpdk	4m 48s
dpdk gcc (ubuntu-24.04)	8s
libreswan (ubuntu-24.04)	4s
linux rpm fedora	4m 1s
build oss-fuzz fuzzers	2m 53s
osx clang --disable-ssl	1m 45s
clang-analyze	20m 0s
linux gcc --disable-ssl	2m 36s
linux clang --disable-ssl	2m 35s
linux gcc c99	2m 35s
linux clang c99	2m 32s
linux gcc test	8m 17s
linux clang address,undefined test	16m 23s
linux gcc test --enable-shared	11m 11s
linux clang test --enable-shared	11m 0s
linux gcc check check-dpdk dpdk	18m 34s
linux clang check check-dpdk dpdk	19m 9s
linux gcc test -ljemalloc	9m 5s
linux clang test -ljemalloc	9m 19s
linux gcc --enable-afxdp	2m 40s
linux clang --enable-afxdp	2m 49s
linux gcc dpdk --enable-shared	4m 27s
linux clang dpdk --enable-shared	3m 51s
linux gcc dpdk-shared	2m 53s
linux clang dpdk-shared	2m 58s
linux gcc dpdk-shared --enable-shared	4m 3s
linux clang dpdk-shared --enable-shared	3m 49s
linux gcc m32 --disable-ssl	2m 31s
linux gcc check-ovsdb-cluster	6m 43s
linux gcc check-kernel -100	10m 41s
linux gcc check-kernel 100-	16m 15s
linux clang address,undefined check-kernel -100	13m 19s
linux clang address,undefined check-kernel 100-	18m 38s
linux gcc check-offloads -100	9m 52s
linux gcc check-offloads 100-	12m 7s
linux gcc dpdk check-system-userspace	12m 15s
linux clang address,undefined dpdk check-system-userspace	15m 43s
linux gcc dpdk check-system-tso	12m 8s
linux gcc dpdk check-afxdp	12m 42s
	5h 17m 19s

Provide feedback