wil6210: support concurrency record in FW file

New FW which supports multiple virtual interfaces, reports
its allowed interface combinations using a special comment
record in the FW file. The format of the interface combinations
is similar to the kernel wiphy->iface_combinations.
When parsing FW file during module initialization, also parse
and validate the concurrency record, and initialize
wiphy->n_iface_combinations and wiphy->iface_combinations
accordingly.

Change-Id: I51d2267bd14da71e759907fe3295397daa0acfc7
Signed-off-by: Lior David <liord@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Git-commit: 7bfe9e22e487b0cb14bc3bd03e6e987d9789756b
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


[ailizaro@codeaurora.org: trivial conflict fixes]
Signed-off-by: Alexei Avshalom Lazar <ailizaro@codeaurora.org>