wil6210: add function name to wil log macros

Add __func__ to wil_err and wil_info for easier
debugging.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: 290206fa7e04ea4c1620aea2624e4d998bc27a0a
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


CRs-Fixed: 1015627
Signed-off-by: Maya Erez <merez@codeaurora.org>
Change-Id: Ib7ff8f1debd6873069df42efd7d832db64701258