staging: ath6kl: Eliminating the symlink to 2.0 header files

Moving the AR6002 hw 2.0 specific register definitions files from
the hw.0 directory to a new directory, 'hw' within hw2.0.

Signed-off-by: Vipin Mehta <vmehta@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>