coresight: Add snapshot of Coresight tgu driver

Add snapshot for coresight tgu driver from msm-4.19
commit 64be469bda3ae ("power: smb1390-psy: Configure IREV
and main's ICL to prevent IREV condition").
Make necessary change to adopt coresight framework change.

Change-Id: Id62440abc6687266cdf988d26e19af39e5875e1c
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>