I am wondering if it is possible to crossfire these graphics cards.
You can see in Speccy or device manager both of two cards but AMD CCC see only the first one.
The same is for example with TESV Skyrim launcher, also see only HD 8330.
So, if that option is locked down, is any opportunity to change 8670m to primary card (to be visible in games etc) instead of 8330?
No, you have Enduro to thank for that. In a laptop with this kind of setup, usually everything is routed directly to the processor while the dedicated graphics chip (your 8670M) renders specific content (such as games) and sends the info to the processor to send to the monitor.