msm: npu: Vote minimum bandwidth to enable Turing GDSCR

Turing GDSCR needs to be enabled before NPU AXI clock is turned
on and it can be turned on by voting minimum bandwidth.

Change-Id: Idc338164b6c66694b1dee4170b068de25552fd1d
Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>