tests: Add configuration for small frequency dividers for system clock

For systems that have both high base (CPU, bus, etc.) frequency and
small divider of the base frequency for system clock and this way,
do not allow 1 second period for the system clock, set the system
clock period to 0.1.

Change-Id: Iafb4604112d4adb8430f8bf57a5a31de3f6cf91d
Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com>