feat support DAC driver for aiit-arm32-board and stm32f407-st-discovery

APP_Framework/Framework/transform_layer/xiuos/transform.c

@@ -155,6 +155,7 @@ int PrivIoctl(int fd, int cmd, void *args)
         ret = ioctl(fd, cmd, ioctl_cfg->args);
         break;
     case ADC_TYPE:
+    case DAC_TYPE:
         ret = ioctl(fd, cmd, ioctl_cfg->args);
         break;
     default:

APP_Framework/Framework/transform_layer/xiuos/transform.h

@@ -139,6 +139,7 @@ enum IoctlDriverType
     I2C_TYPE,
     PIN_TYPE,
     ADC_TYPE,
+    DAC_TYPE,
     DEFAULT_TYPE,
 };