arm64: mvebu: Init COMPHY from the slave-CP on the A8k

The Armada8k implements 2 CPs (communication processors) and the 2nd
CP also is equipped with a COMPHY controller. This patch now loops
over all enabled MISC devices (CP110) enabled in the DT to initialize
all CPs.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Omri Itach <omrii@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>

arch/arm/mach-mvebu/arm64-common.c

@@ -109,12 +109,20 @@ int arch_early_init_r(void)
 {
 	struct udevice *dev;
 	int ret;
-
-	/* Call the comphy code via the MISC uclass driver */
-	ret = uclass_get_device(UCLASS_MISC, 0, &dev);
-	if (ret) {
-		debug("COMPHY init failed: %d\n", ret);
-		return -ENODEV;
+	int i;
+
+	/*
+	 * Loop over all MISC uclass drivers to call the comphy code
+	 * and init all CP110 devices enabled in the DT
+	 */
+	i = 0;
+	while (1) {
+		/* Call the comphy code via the MISC uclass driver */
+		ret = uclass_get_device(UCLASS_MISC, i++, &dev);
+
+		/* We're done, once no further CP110 device is found */
+		if (ret)
+			break;
 	}
 
 	/* Cause the SATA device to do its early init */