wil6210: fw debug mode

refactor module parameter debug_fw to act as "fw debug mode",
where driver do nothing but allow card memory access.

Change-Id: I4876e4e60e9bda55d29fbd58fd07d2d3784ab540
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: bfc2dc7a69a41ba5ee268dac2c464d6b0e50eba7
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


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