PATCH Fix validate_mem_section()

In case of old *mem_section array,
the 2nd validate_mem_section() returns TRUE when
"if (mem_map == 0) {
        mem_map = NOT_MEMMAP_ADDR;"
is executed for all section_nr.
However in case of old *mem_section array,
the 2nd validate_mem_section() must return FALSE.
So this patch fixes the return value.

Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>