msm: mdss: Fix bug while iterating through list of pipes

While handing off pipes from LK to kernel during the continuous
splash screen support, we were iterating through the HW cursor
pipes causing a crash. Only iterate through non cursor pipes.

Change-Id: I1223d34b374c5517c68beaaaa1df8d21f0fe8b83
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>