uintptr_t-ify map_flash_region functions.

unsigned long is not the right type for manipulating pointer values.
Since C99 there are suitable unsigned and signed types available, namely
uintptr_t and intptr_t respectively.

Use them in functions assigned to programmers' map_flash_region fields and
their callers where applicable.

This patch also changes the display width of all associated address values in
physmap.c to 16/8 hex characters depending on the actual size by
introducing a macro PRIxPTR_WIDTH and exploiting printf's * field width
specifier.

Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: svn://coreboot.org/flashrom/trunk@1701 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1