ARM: dts: msm: Remove memory reserve in msmtitainum

Remove memory reserve for spintable method as msmtitanium
is using "qcom,titanium-arm-cortex-acc" method for
secondary cores power up sequence.

Change-Id: I0caa45eb2e4dfd5eb5bb0d7a3f4dcd0ec7917003
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>