Fix spelling in comments and documentation

These spelling bugs were found by codespell:

supressing -> suppressing
transfered -> transferred
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

hw/usb.h

@@ -282,7 +282,7 @@ typedef struct USBDeviceClass {
      * Called from handle_packet().
      *
      * Status gets stored in p->status, and if p->status == USB_RET_SUCCESS
-     * then the number of bytes transfered is stored in p->actual_length
+     * then the number of bytes transferred is stored in p->actual_length
      */
     void (*handle_control)(USBDevice *dev, USBPacket *p, int request, int value,
                            int index, int length, uint8_t *data);
@@ -292,7 +292,7 @@ typedef struct USBDeviceClass {
      * Called from handle_packet().
      *
      * Status gets stored in p->status, and if p->status == USB_RET_SUCCESS
-     * then the number of bytes transfered is stored in p->actual_length
+     * then the number of bytes transferred is stored in p->actual_length
      */
     void (*handle_data)(USBDevice *dev, USBPacket *p);
 
@@ -358,7 +358,7 @@ struct USBPacket {
     bool short_not_ok;
     bool int_req;
     int status; /* USB_RET_* status code */
-    int actual_length; /* Number of bytes actually transfered */
+    int actual_length; /* Number of bytes actually transferred */
     /* Internal use by the USB layer.  */
     USBPacketState state;
     USBCombinedPacket *combined;

tests/qemu-iotests/iotests.py

@@ -43,7 +43,7 @@ def qemu_img(*args):
     return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
 
 def qemu_img_verbose(*args):
-    '''Run qemu-img without supressing its output and return the exit code'''
+    '''Run qemu-img without suppressing its output and return the exit code'''
     return subprocess.call(qemu_img_args + list(args))
 
 def qemu_io(*args):