trace: Remove trace.h from hw/usb/hcd-ehci.h (less dependencies)

This reduces the dependencies on trace.h.
Only one source file which needs hcd-ehci.h also needs trace.h.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/usb/hcd-ehci.c

@@ -28,6 +28,7 @@
  */
 
 #include "hw/usb/hcd-ehci.h"
+#include "trace.h"
 
 /* Capability Registers Base Address - section 2.2 */
 #define CAPLENGTH        0x0000  /* 1-byte, 0x0001 reserved */

hw/usb/hcd-ehci.h

@@ -21,7 +21,6 @@
 #include "qemu/timer.h"
 #include "hw/usb.h"
 #include "monitor/monitor.h"
-#include "trace.h"
 #include "sysemu/dma.h"
 #include "sysemu/sysemu.h"
 #include "hw/pci/pci.h"