msm: camera: isp: Remove false error message in isp driver

Due to the tasklet scheduling, SOF and Epoch irq handling can be out of
order. This causes some false isp error message being reported. This change
removes the false error message due to the out of order irq handling.
This change will remove this unnecessary check.

Change-Id: I7dd7d36692f63a53e54e7afcee4d9ed32cb22bc6
Signed-off-by: Jing Zhou <jzhou70@codeaurora.org>