ARM: dts: msm: Add support for qHD panel for MSM8909

Add DT support for qHD panel for MSM8909. This is needed
since the maximum GPU clock frequency supported for HD &
qHD are different.

Change-Id: I74d75e49b96eae3692592e91a8bdbd89f8240c80
Signed-off-by: Kishan Kumar <kishank@codeaurora.org>