wil6210: fix boot loader "ready" indication

Boot loader "ready" indication has changed from "bit0 set"
to "only bit0 set". This is to address hardware glitches.
Due to glitches, sometimes right after reset register reads
0xffffffff, or (rarely) other garbage.

Reflect this in the driver

Change-Id: I9c56cbb0e277c636fcdc24c903ddb9a3dd5c4bec
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: bb6c8dccfe2302a97d8edd4ba5e6234a8fd3c626
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>