staging: r8192ee: Add source files for core driver

This part is the equivalent of rtlwifi in the wireless tree. As the changes
needed for the RTL8192EE have not yet been merged, a separate version is still
needed.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>