arm: zynq: Remove earlycon from bootargs

Earlyconsole is used for early kernel debugging that's why this option
shouldn't be enabled by default.
Earlyconsole is partially copying the part of the bootlog after
"bootconsole [uart0] disabled".
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-parallella.dts

@@ -34,7 +34,7 @@
 	};
 
 	chosen {
-		bootargs = "earlycon root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait";
+		bootargs = "root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait";
 		stdout-path = "serial0:115200n8";
 	};
 };

arch/arm/boot/dts/zynq-zc702.dts

@@ -30,7 +30,7 @@
 	};
 
 	chosen {
-		bootargs = "earlycon";
+		bootargs = "";
 		stdout-path = "serial0:115200n8";
 	};
 

arch/arm/boot/dts/zynq-zc706.dts

@@ -30,7 +30,7 @@
 	};
 
 	chosen {
-		bootargs = "earlycon";
+		bootargs = "";
 		stdout-path = "serial0:115200n8";
 	};
 

arch/arm/boot/dts/zynq-zed.dts

@@ -29,7 +29,7 @@
 	};
 
 	chosen {
-		bootargs = "earlycon";
+		bootargs = "";
 		stdout-path = "serial0:115200n8";
 	};
 

arch/arm/boot/dts/zynq-zybo.dts

@@ -29,7 +29,7 @@
 	};
 
 	chosen {
-		bootargs = "earlycon";
+		bootargs = "";
 		stdout-path = "serial0:115200n8";
 	};