scripts: kernel-doc: fix typedef identification

Some typedef expressions are output as normal functions.

As we need to be clearer about the type with Sphinx 3.x,
detect such cases.

While here, fix a wrongly-indented block.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

scripts/kernel-doc

@@ -1760,6 +1760,23 @@ sub dump_function($$) {
 	    check_return_section($file, $declaration_name, $return_type);
     }
 
+    # The function parser can be called with a typedef parameter.
+    # Handle it.
+    if ($return_type =~ /typedef/) {
+	output_declaration($declaration_name,
+			   'function',
+			   {'function' => $declaration_name,
+			    'typedef' => 1,
+			    'module' => $modulename,
+			    'functiontype' => $return_type,
+			    'parameterlist' => \@parameterlist,
+			    'parameterdescs' => \%parameterdescs,
+			    'parametertypes' => \%parametertypes,
+			    'sectionlist' => \@sectionlist,
+			    'sections' => \%sections,
+			    'purpose' => $declaration_purpose
+			   });
+    } else {
 	output_declaration($declaration_name,
 			   'function',
 			   {'function' => $declaration_name,
@@ -1773,6 +1790,7 @@ sub dump_function($$) {
 			    'purpose' => $declaration_purpose
 			   });
     }
+}
 
 sub reset_state {
     $function = "";