MRC cache: determine flash size on runtime

It should be possible to put coreboot compiled for smaller chip by
putting it at the end of bigger chip. We already have chip size in
flash->size. Use it.

Tested on Lenovo X230.

Change-Id: If8ff03ed72671a9f2745ed4e759a04e83aa7cc37
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4612
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed