include/configs: Remove rootwait=1 to all the affected boards

rootwait=1 is not a valid kernel boot parameters. According
to the documenation is only rootwait

rootwait	[KNL]	Wait (indefinitely) for root device to show up.
			Useful for devices that are detected asynchronously
			(e.g. USB and MMC devices).

Fix:
Unknown kernel command line parameters "rootwait=1", will be passed to user space.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/include/configs/am43xx_evm.h b/include/configs/am43xx_evm.h
index 665ace5..e0138fe 100644
--- a/include/configs/am43xx_evm.h
+++ b/include/configs/am43xx_evm.h
@@ -159,7 +159,7 @@
 		"root=${nandroot} " \
 		"rootfstype=${nandrootfstype}\0" \
 	"nandroot=ubi0:rootfs rw ubi.mtd=NAND.file-system,4096\0" \
-	"nandrootfstype=ubifs rootwait=1\0" \
+	"nandrootfstype=ubifs rootwait\0" \
 	"nandboot=echo Booting from nand ...; " \
 		"run nandargs; " \
 		"nand read ${fdtaddr} NAND.u-boot-spl-os; " \