coresight: Add snapshot of Coresight dummy driver

Add snapshot for coresight dummy 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: I4c40a64604dc7adc0c9a2c9f9db9ec74232702a2
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>