arm64: dts: mediatek: Fix "mediatek,merge-mute" and "mediatek,merge-fifo-en" types

"mediatek,merge-mute" and "mediatek,merge-fifo-en" properties are defined
and used as boolean properties which in DT have no value.

Signed-off-by: Rob Herring <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm64/boot/dts/mediatek/mt8195.dtsi

···
 			clock-names = "merge","merge_async";
 			power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
 			mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX 0xc000 0x1000>;
-			mediatek,merge-mute = <1>;
+			mediatek,merge-mute;
 			resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE0_DL_ASYNC>;
 		};
 
···
 			clock-names = "merge","merge_async";
 			power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
 			mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX 0xd000 0x1000>;
-			mediatek,merge-mute = <1>;
+			mediatek,merge-mute;
 			resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE1_DL_ASYNC>;
 		};
 
···
 			clock-names = "merge","merge_async";
 			power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
 			mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX 0xe000 0x1000>;
-			mediatek,merge-mute = <1>;
+			mediatek,merge-mute;
 			resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE2_DL_ASYNC>;
 		};
 
···
 			clock-names = "merge","merge_async";
 			power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
 			mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX 0xf000 0x1000>;
-			mediatek,merge-mute = <1>;
+			mediatek,merge-mute;
 			resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE3_DL_ASYNC>;
 		};
 
···
 			clock-names = "merge","merge_async";
 			power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
 			mediatek,gce-client-reg = <&gce0 SUBSYS_1c11XXXX 0x0000 0x1000>;
-			mediatek,merge-fifo-en = <1>;
+			mediatek,merge-fifo-en;
 			resets = <&vdosys1 MT8195_VDOSYS1_SW0_RST_B_MERGE4_DL_ASYNC>;
 		};