dt-bindings: spmi: Add Apple SPMI controller

dt-bindings: spmi: Add Apple SPMI controller

Add bindings for the SPMI controller present on most Apple SoCs

Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://lore.kernel.org/r/20250409-spmi-v4-1-eb81ecfd1f64@gmail.com
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20250518032330.2959766-3-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>