disp: msm: dsi: enable ESD trigger through debugfs in trsuted-vm

Add support to trigger ESD through debugfs by directly
modifying the reset GPIOs TLMM register in trusted-vm as GPIO
driver support is not enabled.

Change-Id: I859affe69c13dbe115a48b0a63a600a57027db58
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>