staging: wilc1000: add maintainers for Atmel 802.11 driver

This patch adds new maintainers who develops new design for Atmel 802.11
link controller and deletes Dean Lee who cannot maintain the wireless
driver anymore.

Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>