Add support for WLAN using wilink8 module. On dra76-evm, MMC4 is
used for connecting to wilink8 module.
Signed-off-by: NVishal Mahaveer <vishalm@ti.com>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>