The current implementation includes a debug mask check both in the macro
expansion and in the function __ath12k_dbg(), which is unnecessary.
Simplify the code by removing the redundant check from the helper function
__ath12k_dbg().
While at this, rename the first argument in macro from ar to ab since the
first argument name in the function __ath12k_dbg() is ab.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@xxxxxxxxxxxxxxxx>