layout: Rename romimages to num_rom_entries.

Since we are planning to support image files for rom entries, rename the
variable used to count the number of known rom entries to avoid confusion.
There is already num_include_args with similar semantics, hence we use
num_rom_entries.

Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>

git-svn-id: svn://flashrom.org/flashrom/trunk@1731 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
layout: Rename romlayout_t to romentry_t.

The type describes one entry of the whole layout actually.
Using layout_entry_t or something similar would be more correct,
but due to it length we will use "rom" instead of "layout" here and
in upcoming code.

Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>

git-svn-id: svn://flashrom.org/flashrom/trunk@1732 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1