kallsyms: unify seq and start_pos fields of struct sym_entry

The struct sym_entry uses the 'seq' and 'start_pos' fields to remember
the index in the symbol table. They serve the same purpose and are not
used simultaneously. Unify them.

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

scripts/kallsyms.c

···
 	unsigned long long addr;
 	unsigned int len;
 	unsigned int seq;
-	unsigned int start_pos;
 	unsigned int percpu_absolute;
 	unsigned char sym[];
 };
···
 		if (!sym)
 			continue;
 
-		sym->start_pos = table_cnt;
+		sym->seq = table_cnt;
 
 		if (table_cnt >= table_size) {
 			table_size += 10000;
···
 		return wa - wb;
 
 	/* sort by initial order, so that other symbols are left undisturbed */
-	return sa->start_pos - sb->start_pos;
+	return sa->seq - sb->seq;
 }
 
 static void sort_symbols(void)