tty: msm_smd_tty: Decrease wakeup timeout to 100ms

This patch will decrease wakeup timeout to 100ms from
500ms post reading data from smd port.

Change-Id: Ifa4426f772633c65f921495b61e305703636fa68
Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>