ARM: dts: msm: Add remote spinlock configuration for sdm855

Add new entry in device tree to enable hw spinlocks. The hw
spinlocks provide a synchronization mechanism for remote
processors.

CRs-Fixed: 2093992
Change-Id: I0f986787243b2559e0a8116d4ba4574caea1e3f0
Signed-off-by: Chris Lew <clew@codeaurora.org>