wifi: wil6210: fix a bunch of kernel-doc warnings

wifi: wil6210: fix a bunch of kernel-doc warnings

scripts/kernel-doc.py reports 51 kernel-doc warnings in wil6210.h.
Fix all kernel-doc warnings reported in wil6210.h.

Several comments are changed from "/**" to "/*" since it appears that
"/**" was used for many non-kernel-doc comments.

- add kernel-doc for missing function parameters
- add one function "Returns:"
- correct kernel-doc struct name to match actual struct name in 2 places

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251117020213.443126-1-rdunlap@infradead.org
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>