tools include: Add UINT_MAX def to kernel.h

The kernel has it and some files we got from there would require us
including the userland header for that, so add it conditionally.

Cc: Adrian Hunter <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Elena Reshetova <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Wang Nan <[e-mail]>
Link: http://lkml.kernel.org/n/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/include/linux/kernel.h

···
 #include <stddef.h>
 #include <assert.h>
 
+#ifndef UINT_MAX
+#define UINT_MAX	(~0U)
+#endif
+
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 
 #define PERF_ALIGN(x, a)	__PERF_ALIGN_MASK(x, (typeof(x))(a)-1)