Various smaller fixes in superiotool:

Various smaller fixes in superiotool:

 - Also dump the extra registers (e.g. EC regs) in --list-supported.

 - Small fix in the code to allow for building with -pedantic (yes,
   the fix is a bit silly, but it's simple and allows us to use the
   -pedantic flag to keep the code even cleaner and nicer).

 - Install the binary in /usr/sbin, as it's meant to be run as root.

 - Small typo in README.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3163 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1