mdss: mdp: avoid mdp done isr wait for split ctrl during reset

A DSI fifo error can occur on one DSI controller and HW will
not generate the mdp done isr interrupt for both controllers
in case of pp split and dual dsi. Current dsi reset routine
only resets the busy checks for the controller where errors
are reported. It should reset both controllers because HW
is not going to the isr for other interrupt where fifo error
is not reported.

Change-Id: I4de587aec0b54d942637fbea3cbe13cb2bdac893
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>