wifi: ath12k: ath12k_mac_set_key(): remove exit label

In ath12k_mac_set_key() removing the exit label was a bit more complex so do
it in a separate patch. Remove the else branch and remove now the unnecessary
ret initialisation.

No functional changes.

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/20241007165932.78081-6-kvalo@kernel.org


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