ath10k: simplify FW binary names

If we have a folder tree to store the fw files, there's no
need to keep the names so complicated.

Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
ath10k: split ath10k_pci_target_ps_control

Divide the target_ps_control into 2 logical pieces:
- ath10k_pci_wake
- ath10k_pci_sleep

Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>