添加功能

scan_files：扫描目录

PORTING/USMART/usmart_config.c

@@ -13,6 +13,7 @@ struct _m_usmart_nametab usmart_nametab[]=
 {
 	(void*)DEBUG,"void DEBUG(void)",
 	(void*)SDRAM_USED,"void SDRAM_USED(void)",
+	(void*)scan_files,"void scan_files(u8 * path)",
 
 	(void*)modelmym_init,"float* modelmym_init(char* model_name)",
 	(void*)modelmym_free,"u8 modelmym_free(char* model_name)",