rtlwifi: import btcoexist and rtl8723 driver
rtlwifi: update rest of the codebase to wireless-testing

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
rtlwifi: move debugfs support to common codebase

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
rtlwifi: finishing touches

 - put debugfs into ieee80211/phyX

 - usb transmit has to bypass IS_USB_STOP
   for firmware download

 - move DESC_PACKET definitions to wifi

 - introduce rtl_mac80211_init

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
rtlwifi: misc checkpatch fixes

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>