kbuild: Drop support for include/asm-<arch> in headers_check.pl

"include/asm-<arch>" was replaced by "arch/<arch>/include/asm" a long
time ago. All assembler header files are now included using
"#include <asm/*>", so there is no longer a need to rewrite paths.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Masahiro Yamada <[e-mail]>

usr/include/Makefile

···
       cmd_hdrtest = \
 		$(CC) $(c_flags) -fsyntax-only -x c /dev/null \
 			$(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \
-		$(PERL) $(src)/headers_check.pl $(obj) $(SRCARCH) $<; \
+		$(PERL) $(src)/headers_check.pl $(obj) $<; \
 		touch $@
 
 $(obj)/%.hdrtest: $(obj)/%.h FORCE

usr/include/headers_check.pl

···
 #
 # headers_check.pl execute a number of trivial consistency checks
 #
-# Usage: headers_check.pl dir arch [files...]
+# Usage: headers_check.pl dir [files...]
 # dir:   dir to look for included files
-# arch:  architecture
 # files: list of files to check
 #
 # The script reads the supplied files line by line and:
···
 use strict;
 use File::Basename;
 
-my ($dir, $arch, @files) = @ARGV;
+my ($dir, @files) = @ARGV;
 
 my $ret = 0;
 my $line;
···
 		my $inc = $1;
 		my $found;
 		$found = stat($dir . "/" . $inc);
-		if (!$found) {
-			$inc =~ s#asm/#asm-$arch/#;
-			$found = stat($dir . "/" . $inc);
-		}
 		if (!$found) {
 			printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
 			$ret = 1;