msm: camera: isp: Check for EOF irq before SOF

If the same IRQ status has EOF and SOF bits set, the EOF is
for the previous frame. So move the check for EOF irq before
SOF. This should avoid any errors in incorrect state machine
transitions.

Change-Id: Iaff149e39ae6d3b674f198c544fc3a390d32c9d6
Signed-off-by: Harsh Shah <harshs@codeaurora.org>