ARM: dts: msm: Use "qcom,thorium-arm-cortex-acc" enable-method

Currently spin-table method is in use for msmthorium, so move
to "qcom,thorium-arm-cortex-acc" enable-method for msmthorium.

Change-Id: I3ebf28c22604c95e1574a413f574b61781006c70
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>