Revert "wifi: ath11k: call ath11k_mac_fils_discovery() without condition"

This reverts commit e149353e. The commit caused
QCA6390 hw2.0 firmware WLAN.HST.1.0.1-05266-QCAHSTSWPLZ_V2_TO_X86-1 to crash
during disconnect:

[71990.787525] ath11k_pci 0000:72:00.0: firmware crashed: MHI_CB_EE_RDDM

Closes: https://lore.kernel.org/all/87edhu3550.fsf@kernel.org/


Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20231023164120.651151-1-kvalo@kernel.org