wifi: ath11k: Correctly use "ab" macro parameter

The checkpatch script is reporting multiple instances of:
	Argument 'x' is not used in function-like macro

Fix these by renaming the argument to match the usage. In the process,
also add parenthesis to the usage to avoid MACRO_ARG_PRECEDENCE
issues.

Compile tested only.

Link: https://patch.msgid.link/20251022-ath11k-bad-macro-arg-v1-1-93a8eadb6191@oss.qualcomm.com


Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>