Nokia RX-51: Change UBIFS volume size to 1870 LEBs in test script

Original Nokia UBIFS system image has 1870 LEBs, so set UBIFS volume size
in test script to the same value. Number of 1870 LEBs corresponds to 230MiB
(LEB size * num of LEBs = 126KiB * 1870 = 230MiB).

Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/test/nokia_rx51_test.sh b/test/nokia_rx51_test.sh
index 28aa554..abd1712 100755
--- a/test/nokia_rx51_test.sh
+++ b/test/nokia_rx51_test.sh
@@ -129,7 +129,7 @@
 mode=ubi
 image=ubifs.img
 vol_id=0
-vol_size=160MiB
+vol_size=230MiB # 1870 LEBs
 vol_type=dynamic
 vol_name=rootfs
 vol_alignment=1