wil6210: enlarge FW mac_rgf_ext section for Sparrow D0

Sparrow D0 chips have slightly larger mac_rgf_ext section
in order to support extra features such as multiple virtual
interfaces.

Change-Id: I314b240498388a83ebf13d852ff53092abad6e2a
Signed-off-by: Lior David <liord@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Git-commit: 54fca595d1eec3d7d008b322a53a1ebed7f78193
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Signed-off-by: Maya Erez <merez@codeaurora.org>