Make fmtscan support '__asm'

'__asm' is a historical keyword of GCC that the current documentation
doesn't mention.

Change-Id: Ia9c4d706f3cda5e6522fc964cf2e5171aed0e544

Author: lumynou5

tools/fmtscan.c

@@ -631,7 +631,10 @@ static get_char_t skip_macros(parser_t *p)
 
 static get_char_t skip_inline_asm(parser_t *p, bool underscore)
 {
-    get_char_t ch = get_char(p);
+    int paren = 0;
+    get_char_t ch;
+
+    ch = get_char(p);
     if (ch != 's')
         goto check_s_failed;
     if (UNLIKELY(ch == PARSER_EOF))
@@ -645,17 +648,17 @@ static get_char_t skip_inline_asm(parser_t *p, bool underscore)
     if (underscore) {
         ch = get_char(p);
         if (ch != '_')
-            goto check_underline_1_failed;
+            goto not_wrapped;
         if (UNLIKELY(ch == PARSER_EOF))
             return ch;
         ch = get_char(p);
         if (ch != '_')
-            goto check_underline_2_failed;
+            goto check_underline_failed;
         if (UNLIKELY(ch == PARSER_EOF))
             return ch;
     }
+not_wrapped:
 
-    int paren = 0;
     do {
         ch = get_char(p);
         if (ch == '\n') {
@@ -678,9 +681,8 @@ static get_char_t skip_inline_asm(parser_t *p, bool underscore)
     } while (paren);
     return PARSER_COMMENT_FOUND;
 
-check_underline_2_failed:
+check_underline_failed:
     unget_char(p);
-check_underline_1_failed:
     unget_char(p);
 check_m_failed:
     unget_char(p);