Default environments: Do not continue when tftp failed

When we fail to download the kernel image (for example when the
user pressed ctrl-c) do not try to boot the image

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

board/imx27ads/env/bin/boot

@@ -30,7 +30,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 else
 	bootm /dev/nor0.kernel

board/ipe337/env/bin/boot

@@ -47,7 +47,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 else
 	bootm $act_kernel

board/kp_ukd_r1_num/env/bin/boot

@@ -30,7 +30,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 else
 	bootm /dev/nor0.kernel

board/pcm037/env/bin/boot

@@ -37,7 +37,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 elif [ $kernel = nor ]; then
 	bootm /dev/nor0.kernel

board/pcm038/env/bin/boot

@@ -37,7 +37,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 elif [ $kernel = nor ]; then
 	bootm /dev/nor0.kernel

board/phycore_mcf54xx/env/bin/boot

@@ -30,7 +30,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 else
 	bootm /dev/nor0.kernel

board/pm9263/env/bin/boot

@@ -37,7 +37,7 @@ if [ $kernel = net ]; then
 	if [ x$ip = xdhcp ]; then
 		dhcp
 	fi
-	tftp $uimage uImage
+	tftp $uimage uImage || exit 1
 	bootm uImage
 elif [ $kernel = nor ]; then
 	bootm /dev/nor0.kernel