Added usb_standard_request from libusb.

nx/include/switch/services/usb.h

@@ -147,6 +147,53 @@ enum usb_transfer_type {
     USB_TRANSFER_TYPE_BULK_STREAM = 4,
 };
 
+/// Imported from libusb, with changed names.
+enum usb_standard_request {
+    /** Request status of the specific recipient */
+    USB_REQUEST_GET_STATUS = 0x00,
+
+    /** Clear or disable a specific feature */
+    USB_REQUEST_CLEAR_FEATURE = 0x01,
+
+    /* 0x02 is reserved */
+
+    /** Set or enable a specific feature */
+    USB_REQUEST_SET_FEATURE = 0x03,
+
+    /* 0x04 is reserved */
+
+    /** Set device address for all future accesses */
+    USB_REQUEST_SET_ADDRESS = 0x05,
+
+    /** Get the specified descriptor */
+    USB_REQUEST_GET_DESCRIPTOR = 0x06,
+
+    /** Used to update existing descriptors or add new descriptors */
+    USB_REQUEST_SET_DESCRIPTOR = 0x07,
+
+    /** Get the current device configuration value */
+    USB_REQUEST_GET_CONFIGURATION = 0x08,
+
+    /** Set device configuration */
+    USB_REQUEST_SET_CONFIGURATION = 0x09,
+
+    /** Return the selected alternate setting for the specified interface */
+    USB_REQUEST_GET_INTERFACE = 0x0A,
+
+    /** Select an alternate interface for the specified interface */
+    USB_REQUEST_SET_INTERFACE = 0x0B,
+
+    /** Set then report an endpoint's synchronization frame */
+    USB_REQUEST_SYNCH_FRAME = 0x0C,
+
+    /** Sets both the U1 and U2 Exit Latency */
+    USB_REQUEST_SET_SEL = 0x30,
+
+    /** Delay from the time a host transmits a packet to the time it is
+     * received by the device. */
+    USB_SET_ISOCH_DELAY = 0x31,
+};
+
 /// Imported from libusb, with changed names.
 enum usb_iso_sync_type {
     USB_ISO_SYNC_TYPE_NONE = 0,