cnss2: Update QMI header to add voltage field target cap message

The voltage field is for open loop CPR feature. After reading fuse,
firmware will update the proper value to host through QMI message.
Host will then config it to RPMh using TCS command to make sure
corresponding regulator behaves properly.

Change-Id: I4bb2e28ee44eda53b9513a311337db424ad517cf
Signed-off-by: Yue Ma <yuem@codeaurora.org>