Fix possible UnicodeDecodeError when reading model from sysfs
Fix possible UnicodeDecodeError when reading model from sysfs

Some Innovation IT NVMe devices have an (invalid) unicode in their
model name.

Resolves: rhbz#1849326

rvykydal/blivet,jkonecny12/blivet,vojtechtrefny/blivet,rvykydal/blivet,jkonecny12/blivet,vojtechtrefny/blivet