nt: usb: USB_RTL8153_ECM should not default to y

In general, device drivers should not be enabled by default.

Fixes: 657bc1d1 ("r8153_ecm: avoid to be prior to r8152 driver")
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210113144309.1384615-1-geert+renesas@glider.beSigned-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/usb/Kconfig

@@ -631,7 +631,6 @@ config USB_NET_AQC111
 config USB_RTL8153_ECM
 	tristate "RTL8153 ECM support"
 	depends on USB_NET_CDCETHER && (USB_RTL8152 || USB_RTL8152=n)
-	default y
 	help
 	  This option supports ECM mode for RTL8153 ethernet adapter, when
 	  CONFIG_USB_RTL8152 is not set, or the RTL8153 device is not