[WIFI][BT] disable old mwifiex driver and rfkill-rk, support recent mwifiex version
This MR:
- disables the in-tree mwifiex module from the defconfig, to allow using the new version of the module built externally from yocto, as done for i.MX
- disables the rfkill-rk module, which isn't needed and interferes with the new mwifiex driver on C31
- to allow disabling rfkill-rk, it was made an optional dep of pcie_dw_rockchip instead of a hard dep. Previously, it was added as a hard dependency in the Kconfig, but this caused the pcie driver to fail quietly and the PCIe to stop working on E09 when built without rfkill-rk
Tested on D23 (AW-CM390SM M.2 module), C31 and E09.
Edited by Alessandro Pecugi