fbdev: msm: handle unbalanced TE irq calls

Due to TE irq enabled/disabled from both dsi blank/unblank
and from the wait4pingpong function during esd panel
recovery, which causes unbalanced te irq calls during
enabling, this fails panel recovery fail during esd test.
Fix the issue by synchronizing the irq calls using single
function call to update the te irq from different functions.

Change-Id: Ia7a532f28f6ecc1c509406ca1dbc129fcd8a9244
Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>