mali_kbase: Add multiplier for timeout limits

Adds TICK_MULTIPLIER which is multiplied into various timeout values.
This can be set such that slower systems (such as emulation) can be
allowed to run longer in (wall clock) time before timing out.

Signed-off-by: Sidath Senanayake <sidaths@google.com>
Change-Id: I1aaa472d0d7048c6fdcb738986514755d95befd2