kbuild: uapi: move all include path flags together

kbuild: uapi: move all include path flags together

The argument to add the root of the UAPI header tree to the include path
is separated from the other arguments concerning the include path.

Move all include path arguments together for more consistency and
balanced line lengths.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-2-35d6d0ed863f@weissschuh.net
Signed-off-by: Nicolas Schier <nsc@kernel.org>