fix(plat/rcar): fix to load image when option BL2_DCACHE_ENABLE is enabled

- Modify load destination variable of the Cert Header to static.
- Modify the return value to error (IO_FAIL) when failed to check
  the Cert Header.

Signed-off-by: Koichi Yamaguchi <koichi.yamaguchi.zb@hitachi.com>
Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: Ief09a841ec8d2ae236de82d04855e6a47cfb43f0
1 file changed