ARM: dts: Change the vertical back porch value for nt33590 panel

Currently the vertical back porch of this panel is very low,
and causes performance related issues,hence increase the vbp of
this panel properly with correct dsi panel sequence to accommodate
this vbp.

Change-Id: I4f0771fa4f827adca1f52b6e71cb968cc6602112
Signed-off-by: Anusha Koduru <kanusha@codeaurora.org>