misc/brltty: prevent from using linux/input.h if present

Remove all possibilities to find linux/input.h. OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/misc/brltty/Makefile,v
diff -u -p -r1.25 Makefile
--- Makefile 27 Sep 2023 09:52:09 -0000 1.25
+++ Makefile 2 Nov 2023 20:09:34 -0000
@@ -1,7 +1,7 @@
COMMENT= access software for a blind person using a braille terminal

DISTNAME= brltty-3.6
-REVISION= 7
+REVISION= 8
CATEGORIES= misc
HOMEPAGE= https://brltty.app
SITES= https://brltty.app/archive/
Index: patches/patch-configure
===================================================================
RCS file: /cvs/ports/misc/brltty/patches/patch-configure,v
diff -u -p -r1.5 patch-configure
--- patches/patch-configure 11 Mar 2022 19:38:05 -0000 1.5
+++ patches/patch-configure 2 Nov 2023 20:09:35 -0000
@@ -1,7 +1,37 @@
Index: configure
--- configure.orig
+++ configure
-@@ -7790,6 +7790,7 @@ _ACEOF
+@@ -6605,7 +6605,7 @@ done
+
+
+
+-for ac_header in sys/io.h sys/modem.h machine/speaker.h linux/vt.h linux/input.h
++for ac_header in sys/io.h sys/modem.h machine/speaker.h linux/vt.h
+ do
+ as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ if eval "test \"\${$as_ac_Header+set}\" = set"; then
+@@ -6755,20 +6755,6 @@ echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+ if eval "test \"\${$as_ac_Header+set}\" = set"; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+ else
+- cat >conftest.$ac_ext <<_ACEOF
+-#line $LINENO "configure"
+-/* confdefs.h. */
+-_ACEOF
+-cat confdefs.h >>conftest.$ac_ext
+-cat >>conftest.$ac_ext <<_ACEOF
+-/* end confdefs.h. */
+-
+-#include <linux/input.h>
+-
+-
+-#include <$ac_header>
+-_ACEOF
+-rm -f conftest.$ac_objext
+ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+@@ -7790,6 +7776,7 @@ _ACEOF
;;
openbsd*)
system_object="openbsd"