Nokia RX-51: Do not set useless ARCH= in test script

U-Boot ignores ARCH= variable.

Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/test/nokia_rx51_test.sh b/test/nokia_rx51_test.sh
index d2417a9..3fabc0e 100755
--- a/test/nokia_rx51_test.sh
+++ b/test/nokia_rx51_test.sh
@@ -36,7 +36,7 @@
 
 # First compile u-boot.bin binary for Nokia RX-51 board
 make nokia_rx51_config
-make -j4 u-boot.bin ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
+make -j4 u-boot.bin CROSS_COMPILE=arm-linux-gnueabi-
 
 # And then do all stuff in temporary directory
 mkdir -p nokia_rx51_tmp