K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2022-07-29T18:50:42.607801Z
K 7
svn:log
V 1284
Adjust function definitions in kern_cons.c to avoid clang 15 warnings

With clang 15, the following -Werror warnings are produced:

    sys/kern/kern_cons.c:201:14: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
    cninit_finish()
                 ^
                  void
    sys/kern/kern_cons.c:376:7: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
    cngrab()
          ^
           void
    sys/kern/kern_cons.c:389:9: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
    cnungrab()
            ^
             void
    sys/kern/kern_cons.c:402:9: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
    cnresume()
            ^
             void

This is because cninit_finish(), cngrab(), cnungrab(), and cnresume()
are declared with (void) argument lists, but defined with empty argument
lists. Make the definitions match the declarations.

MFC after:	3 days

(cherry picked from commit 9806e82a23924f32dc5976bc8687fbbe293a140b)

Git Hash:   b59fd9264f9eb11a99b0fa4ce73fc5d75df48d37
Git Author: dim@FreeBSD.org
END