Clean up many C99 integer types format specifiers

Clean up many C99 integer types format specifiers

This eliminates most of the warnings reported when building for
arm-none-eabi (newlib).

Hsiangkai, there're many similar warnings left in your nds32 files, I
didn't have the nerve to clean them all, probably you could pick it
up.

Change-Id: Id3bbe2ed2e3f1396290e55bea4c45068165a4810
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/1674
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>