README.scrapyard: fill commit and date fields

This commit was generated by the following command:

    scripts/fill_scrapyard.py

The commit-ID of CPCIISER4 removal has been fixed by hand because
the board was removed by commit 370572601027 (ppc4xx: remove CPCIISER4
board), but it was added to README.scrapyard by commit 9a4018e09a2f
(ppc4xx: remove DP405 board).

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>