ath10k: add copy engine register MAP for wcn3990 target

Copy engine is a host to target communication interface
between wlan firmware and wlan wcn3990 platform driver. Add copy
engine register map for wcn3990 wlan module. This add support
for the copy engine source/destination ring configuration for
wcn3990 chipset.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>