wifi: ath12k: cleanup unneeded labels

After removing the conf_mutex in the previous patch there are now unnecessary
labels in mac.c. Remove those and instead use directly return.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20241007165932.78081-5-kvalo@kernel.org


Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>