Add support for BCM43596 dual-band AC chip, found in
SONY Xperia X Performance, XZ and XZs smartphones (and
*possibly* other devices from other manufacturers).
The chip doesn't require any special handling and seems to work
just fine OOTB.
PCIe IDs taken from: https://github.com/sonyxperiadev/kernel/commit/9e43fefbac8e43c3d7792e73ca52a052dd86d7e3.patch