Hi Sedat, I would like to help you, but at the same time not to mislead, as it’s been a time since I touched that. So take everything with a grain of salt and correct me where I might be wrong/forgot.
I am not sure if I need to load the PN544 (I2C) driver?
Yes, the driver is needed, for PN547 it’s NXP NPC100, the driver is drivers/nfc/nxp-nci.
Do I need these firmware files installed?
To start with, i.e. for a simple signal through like reading a tag, most likely not (the chip is usually provisioned with some FW). Regards, Oleg