msm: camera: icp: Reset current clock in power collapse

ICP driver is not resetting curr_clk variable on power collapse.
During the next session if base_clk is equal to curr_clk then clock
is not updated.

CRs-Fixed: 2661166
Change-Id: I9d86bf33fdf576a91b6e33c5b5db542c22c4b36e
Signed-off-by: Trishansh Bhardwaj <tbhardwa@codeaurora.org>