src, util: Clean up makefile.inc in text, help & comments

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Ib69236fb5d68272f92405512dc231fa75ecccaa6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80125
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

util/kconfig/patches/0008-kconfig-Add-wildcard-support-for-source.patch

@@ -8,7 +8,7 @@ wildcards (e.g. source src/mainboard/*/Kconfig) which
 makes automatic inclusion of all boards a tedious task
 and prevents us from implementing "drop in" boards.
 
-In our Makefile.inc files we already include mainboard
+In our Makefile.mk files we already include mainboard
 directories per wildcard, so let's add the infrastructure
 to do the same with Kconfig.
 
@@ -28,7 +28,7 @@ Index: kconfig/lexer.l
 +++ kconfig/lexer.l
 @@ -8,6 +8,7 @@
  %{
- 
+
  #include <assert.h>
 +#include <glob.h>
  #include <limits.h>
@@ -37,7 +37,7 @@ Index: kconfig/lexer.l
 @@ -439,6 +440,32 @@ void zconf_nextfile(const char *name)
  	current_file = file;
  }
- 
+
 +void zconf_nextfiles(const char *wildcard)
 +{
 +	glob_t g;
@@ -78,7 +78,7 @@ Index: kconfig/lkc.h
 +void zconf_nextfiles(const char *name);
  int zconf_lineno(void);
  const char *zconf_curname(void);
- 
+
 Index: kconfig/parser.y
 ===================================================================
 --- kconfig.orig/parser.y
@@ -91,4 +91,4 @@ Index: kconfig/parser.y
 +	zconf_nextfiles($2);
  	free($2);
  };
- 
+

util/scripts/rm_unused_code

@@ -259,7 +259,7 @@ remove_kconfigs() {
 remove_unused() {
   local dir
   # Most files can be removed simply by looking at the time, but
-  # all Kconfig and Makefile.inc files in the entire tree are accessed
+  # all Kconfig and Makefiles in the entire tree are accessed
   # whether they're used or not.
   remove_kconfigs