doc: update partition desc for up2 board
modify partition desc table of up2 board to make it consistent with
launch uos script.
[base]
# The sequence matters, and the index starts from p1.
# The fastboot ABL by default boots from the 2nd partition.
-partitions = sos_rootfs sos_boot data_partition
+partitions = data_partition sos_boot sos_rootfs
device = auto
+[partition.data_partition]
+label = data_partition
+len = 20000
+type = linux
+
[partition.sos_boot]
label = sos_boot
len = 100
@@ -16,11 +21,6 @@ type = linux
[partition.sos_rootfs]
label = sos_rootfs
-len = 4000
-type = linux
-
-[partition.data_partition]
-label = data_partition
len = -1
type = linux
# ------------------ END MIX-IN DEFINITIONS ------------------
