sub-command 'bootpart-resize' check for argc == 4,
it will retrun CMD_RET_FAILURE when argc value not matched.
but bootpart-resize's maxarg is 3, which means you never execute
this sub-command successfully.
fix it by change bootpart-resize maxarg to 4.
Signed-off-by: wally.yeh <wally.yeh@atrustcorp.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Pierre Aubert <p.aubert@staubli.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>