Merge branch 'uapi-use-uapi-definitions-of-int_max-and-int_min'

Thomas Weißschuh says:

====================
uapi: Use UAPI definitions of INT_MAX and INT_MIN

Using <limits.h> to gain access to INT_MAX and INT_MIN introduces a
dependency on a libc, which UAPI headers should not do.

Introduce and use equivalent UAPI constants.
====================

Link: https://patch.msgid.link/20260113-uapi-limits-v2-0-93c20f4b2c1a@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>