os_win32.cpp: Clear ProtocolDataRequestSubValue for NVMe Get Log Page

commands because newer drivers pass this value as CDW12 (LPOL) to the drive.
This fixes log page access for NVMe 1.2.1+ drives (#1201).

Thanks to Vikram Manja for bug report and testing.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@4920 4ea69e1a-61f1-4043-bf83-b5c94c648137