ARM: dts: msm: Remove cdsp context banks for SDM636

Remove the context banks of cdsp from fastrpc device node
for SDM636

Change-Id: I9a238ad21f253da3c4f707a71009e02e9660ed1b
Acked-by: Chenna Kesava Raju <chennak@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>