Revert "ARM: dts: msm: Add initial support for msm8998-9x55"

This reverts commit a87cd547 ("ARM: dts: msm: Add initial
support for msm8998-9x55").

8998-9x55 platform doesn't need to be supported on this branch,
hence, remove support for it.

Change-Id: Ibc529559c04a4867ca82403a0bbf37428255e4f3
Signed-off-by: Mohammed Khajapasha <mkhaja@codeaurora.org>