dt-bindings: mfd: convert to yaml Qualcomm SPMI PMIC

Convert Qualcomm SPMI PMIC binding to yaml format.

Additional changes:
 - filled many missing compatibles

Co-developed-by: Caleb Connolly <caleb@connolly.tech>
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220626191630.176835-1-david@ixit.cz