quirks: relax DMI modalias match for Purism Librem 14v1
Both "svnPurism:pnLibrem14:" and "svnPurism:pnlibrem_14:" are possible
Related to #629 (closed) and expands on !650 (merged)
Both "svnPurism:pnLibrem14:" and "svnPurism:pnlibrem_14:" are possible
Related to #629 (closed) and expands on !650 (merged)