ARM: Kirkwood: Replace mrvl with marvell

It has been decided to use marvell, not mrvl, in the compatibility
property. Search & replace.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index b2185f4..ebc1649 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -297,7 +297,7 @@
 
 #ifdef CONFIG_OF
 static struct of_device_id rtc_mv_of_match_table[] = {
-	{ .compatible = "mrvl,orion-rtc", },
+	{ .compatible = "marvell,orion-rtc", },
 	{}
 };
 #endif