ARM: dts: motorola-mapphone-common: remove unneeded "simple-graph-card"

Audio Graph Card is using "audio-graph-card" prefix instead of
"simple-graph-card", and moreover "widgets / routing" doesn't need it.
This patch removes unsupported "simple-graph-card" prefix from
motorola-mapphone-common.dtsi and vendor-prefixes.yaml.

Signed-off-by: Kuninori Morimoto <[e-mail]>
Reviewed-by: Sebastian Reichel <[e-mail]>
Acked-by: Tony Lindgren <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/vendor-prefixes.yaml

···
   "^(keypad|m25p|max8952|max8997|max8998|mpmc),.*": true
   "^(pinctrl-single|#pinctrl-single|PowerPC),.*": true
   "^(pl022|pxa-mmc|rcar_sound|rotary-encoder|s5m8767|sdhci),.*": true
-  "^(simple-audio-card|simple-graph-card|st-plgpio|st-spics|ts),.*": true
+  "^(simple-audio-card|st-plgpio|st-spics|ts),.*": true
 
   # Keep list in alphabetical order.
   "^abilis,.*":

arch/arm/boot/dts/motorola-mapphone-common.dtsi

···
 		compatible = "audio-graph-card";
 		label = "Droid 4 Audio";
 
-		simple-graph-card,widgets =
+		widgets =
 			"Speaker", "Earpiece",
 			"Speaker", "Loudspeaker",
 			"Headphone", "Headphone Jack",
 			"Microphone", "Internal Mic";
 
-		simple-graph-card,routing =
+		routing =
 			"Earpiece", "EP",
 			"Loudspeaker", "SPKR",
 			"Headphone Jack", "HSL",