dt-bindings: mfd: syscon: Add qcom,apq8064-mmss-sfpb

Add compat string for Qualcomm MultiMedia SubSystem System FPB.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250425-fix-nexus-4-v3-2-da4e39e86d41@oss.qualcomm.com


Signed-off-by: Lee Jones <lee@kernel.org>