ARM: dts: msm: remove reserved memory for continuous splash

Remove reserved memory space allocated for continuous splash
feature by removing the continuous splash node on APQ8009 as
continuous splash is not available on robot-som variant.

Change-Id: I6b87623e9fce7806f254fc1420c83bb6db4b9f97
Signed-off-by: Chirag Khurana <ckhurana@codeaurora.org>