wifi: ath12k: Fix devmem address prefix when logging

Currently when ath12k QMI logging is enabled, messages such as the
following can be logged:

ath12k_pci 0000:03:00.0: devmem [0] start ox113000 size 20480

Replace ox% with 0x% to get a proper hex address prefix:

ath12k_pci 0000:03:00.0: devmem [0] start 0x113000 size 20480

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240523-ox-v1-1-112ae7350059@quicinc.com