soc: qcom: Increase the retry timeout to 2 seconds

Increase the scm retry timeout to 2 seconds and add a warning
message if the call takes longer than 1 second.

CRs-Fixed: 975433
Change-Id: I7719df41e491c9a8c80b8547de14bc8c71bf7c8d
Signed-off-by: Runmin Wang <runminw@codeaurora.org>