If the registry type is NONE and the string is all numeric or
if the type is DWORD, the string is converted to a DWORD and then
stored into the registry as a REG_DWORD using RegSetValueEx().
The input parameter should be a pointer to the DWORD variable not
its value.
Change-Id: I9ff12121c6c17eb5afb2ea89adf8bb9cc6aa3a89