dts: arm: nxp: add clock outputs for LPC55sxx flexcomm nodes

Add clock outputs for all LPC55Sxx flexcomm nodes, so these nodes can
request their frequency via the clock management subsystem

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

Author: danieldegrasse

dts/arm/nxp/nxp_lpc55S6x_common.dtsi

@@ -239,6 +239,8 @@
 		dmas = <&dma0 4>, <&dma0 5>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom0_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm1: flexcomm@87000 {
@@ -250,6 +252,8 @@
 		dmas = <&dma0 6 &dma0 7>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom1_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm2: flexcomm@88000 {
@@ -261,6 +265,8 @@
 		dmas = <&dma0 10 &dma0 11>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom2_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm3: flexcomm@89000 {
@@ -272,6 +278,8 @@
 		dmas = <&dma0 8 &dma0 9>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom3_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm4: flexcomm@8a000 {
@@ -283,6 +291,8 @@
 		dmas = <&dma0 12 &dma0 13>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom4_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm5: flexcomm@96000 {
@@ -294,6 +304,8 @@
 		dmas = <&dma0 14 &dma0 15>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom5_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm6: flexcomm@97000 {
@@ -305,6 +317,8 @@
 		dmas = <&dma0 16 &dma0 17>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom6_clock>;
+		clock-output-names = "default";
 	};
 
 	flexcomm7: flexcomm@98000 {
@@ -316,6 +330,8 @@
 		dmas = <&dma0 18 &dma0 19>;
 		dma-names = "rx", "tx";
 		status = "disabled";
+		clock-outputs = <&fxcom7_clock>;
+		clock-output-names = "default";
 	};
 
 	sdif: sdif@9b000 {