usb: musb-new: sunxi: remove unused define

This is a remnant from when the USB controller driver managed
the reset signal itself. A patch from the very end of 2018 changed
this driver to delegate reset (and clock) management to the proper
control unit driver, but left this unused define behind.

Signed-off-by: Sam Edwards <CFSworks@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c
index dac98ae..485b9dc 100644
--- a/drivers/usb/musb-new/sunxi.c
+++ b/drivers/usb/musb-new/sunxi.c
@@ -81,8 +81,6 @@
  * From usbc/usbc.c
  ******************************************************************************/
 
-#define OFF_SUN6I_AHB_RESET0	0x2c0
-
 struct sunxi_musb_config {
 	struct musb_hdrc_config *config;
 };