Modifiers currently keep their conflicting and supported devices's
names, and these names are resolved to devices every time we need to use
them. Instead, resolve these device names while creating the modifier
struct and keep track of the resulting device structs in idxsets, same
as how device structs keep track of their support relations.
Link: 9b06e8fef4
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
3ef2e874b2