RFC: Driver for Wireless RNDIS USB devices.

Hello,

This is second try on wireless RNDIS patchset started by Bjorge Dijkstra. Since Bjorge has disappeared, I claim maintainership of rndis_wext and this patchset until he returns.

This patchset adds support for various 802.11 USB devices based on Broadcom 4320 chip. Chip uses RNDIS to communicate with the host, so module depend heavily on rndis_host/cdc_ether/usbnet and needs some changes on these modules in order to work.

Patches 1-6 are from first patchset:
1. Fix sparse warning: returning void valued expression
2. [cdc_ether] Hardwire CDC descriptors when missing
3. [rndis_host] Use 1KB buffer in rndis_unbind
4. [rndis_host] Halt device if rndis_bind fails
5. [rndis_host] Fix rndis packet filter flags
6. [usbnet] Use wlan device name for RNDIS wireless devices

Of these 1, 3 and 4 are not required for this version of rndis_wext to work.

Actual wireless part is changed from extension on rndis_host to separate driver. Different devices are detected by device specific USB vendor/product IDs as the way done with Windows drivers instead of detecting RNDIS media type like in first patchset.

New patches 7-14:
7. [rndis_host] Split up rndis_host.c
8. [rndis_host] export functions
9. [usbnet] add driver_priv pointer to 'struct usbnet'
10. [rndis_host] Add rndis_early_init function pointer to 'struct rndis_data'.
11. [rndis_host] Add rndis_link_change function pointer to 'struct rndis_data'.
12. Move usbnet.h and rndis_host.h to include/linux/usb
13. [rndis_host] blacklist known wireless RNDIS devices
14. Add new driver 'rndis_wext' for wireless RNDIS devices.

Patches should be applied in order, series apply cleanly to 2.6.24-rc8.

- Jussi Kivilinna