build

nvme: allow mmap_registers from block device #2847

Job	Run time
default (gcc, release)	39s
default (gcc, debug)	25s
cross (s390x)	41s
cross (ppc64le)	43s
cross (armhf)	42s
default (clang, release)	33s
muon minimal static	30s
make static	1m 32s
default (clang, debug)	25s
build libnvme and nvme-cli separately	39s
fallback shared libraries	0s
	6m 49s

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