msm: vidc: Increase poll time out for boot FW

Increase the number of tries for booting up
the firmware, since the repsonse from FW is
intermittently slow on lagoon.

Change-Id: I499efc5d50ac9ef5357bd823d3b9c5a3da561852
Signed-off-by: Priyanka Gujjula <pgujjula@codeaurora.org>