1) nand_upgrade_tar: use a simpler condition that matches if () { }
logic and fix check of $kernel_length variable
2) nand_do_upgrade_stage2: use case, otherwise one could believe we
always call nand_upgrade_tar
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 43373
db69761f94