Hello, Wolfgang!

I found two bugs in common/cmd_nand.c when debugging nand flash, which
is from u-boot-1.1.4 and the same with git tree:

1. there are 3 places using "not exact" or "wrong" parameters in
strncmp() function.

strncmp(cmdtail, ".oob", 2)    ==> strncmp(cmdtail, ".oob", 4)
strncmp(cmdtail, ".jffs2", 2)  ==> strncmp(cmdtail, ".jffs2", 6)
strncmp(cmdtail, ".jffs2s", 2) ==> strncmp(cmdtail, ".jffs2s", 7)

2. "nand read.jffs2" command will bypass "nand read.jffs2s" command
for the else-if branch.

FYI, the attachment is a diff patch with "-purN" options.

Best regards,
Dongyan Chai