disk-label: increase max PREP boot image size to 64MB

The disk-label package limits the maximum PREP boot image size
to 32 MB. Recent AIX boot images generated by bosboot can exceed
this limit, causing the firmware to fail to load the complete
image and preventing the system from booting.

Increase the maximum supported PREP boot image size from 32 MB
to 64 MB.

Tested with QEMU pSeries and AIX using boot images up to 64 MB.

Signed-off-by: Dasipogu Naga Sreenu <Dasipogu.Naga.Sreenu@ibm.com>
Signed-off-by: Thomas Huth <th.huth@posteo.eu>
diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs
index 661c6b0..9adab46 100644
--- a/slof/fs/packages/disk-label.fs
+++ b/slof/fs/packages/disk-label.fs
@@ -18,8 +18,8 @@
 \ partition. This is required to keep the load time in reasonable limits if the
 \ PREP partition becomes big.
 \ If we ever want to put a large kernel with initramfs from a PREP partition
-\ we might need to increase this value. The default value is 65536 blocks (32MB)
-d# 65536 value max-prep-partition-blocks
+\ we might need to increase this value. The default value is 131072 blocks (64MB)
+d# 131072 value max-prep-partition-blocks
 d# 4096 CONSTANT block-array-size
 
 s" disk-label" device-name