qcacmn: Revise dfs_log() for updated kernel-doc script

In Linux kernel 5.5, commit 43756e347f21 ("scripts/kernel-doc: Add
support for named variable macro arguments") improved how named
variable macro arguments are handled, and changed how they are
documented in kerneldoc comments from "@param...", to "@param",
deprecating the old syntax.

In Linux kernel 6.3, commit 3bdd9f075f54 ("scripts: kernel-doc: Remove
workaround for @param... syntax") removed support for the old syntax.

Currently the dfs_log() documentation uses the old syntax, so update
the documentation to use the new syntax.

Change-Id: I1aa44cd36ffacb0b26ee279496fc5a99b8de371d
CRs-Fixed: 3451492

umac/dfs/core/src/dfs.h

@@ -57,7 +57,7 @@
  * @dfs: The dfs object pointer or NULL if dfs is not defined.
  * @sm: Submodule BITMASK.
  * @level: QDF trace level.
- * @args...: Variable argument list.
+ * @args: Variable argument list.
  *
  * The logging is controlled by two bitmasks:
  * 1) submodule bitmask: sm