msm: camera: Modify interrupt handler for CCI

In the case of read burst, sometimes hardware randomly
raises interrupts for each cycle. To overcome it, once
threhold is hit, disable threshold IRQ till complete data
is read from client.

Change-Id: If0fe8c3723cee8003e0dddd12bf1af74c11c8e95
Signed-off-by: Viswanadha Raju Thotakura <viswanad@codeaurora.org>