tools: get rid of additional min() and max() definitions

tools: get rid of additional min() and max() definitions

Defining min(), min_t(), max() and max_t() at other places than
xen-tools/common-macros.h isn't needed, as the definitions in said
header can be used instead.

Same applies to BUILD_BUG_ON() in hvmloader.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>