msm: lpm_resources: Initalize L2 flush flag

L2 flush flag needs to be initialized to 0 in probe,
else the value defaults to 1, will result in L2
being flushed when all cores are power collapsed.

Change-Id: I0912b4053bf7f0bda01b5918a48ac3140b103d1e
Signed-off-by: Karthik Parsha <kparsha@codeaurora.org>