usb: dwc2: handle return code of dev_read_size() in of to, plat function

dev_read_size() returns -EINVAL (-22) if the property "g-tx-fifo-size"
does not exist. If that's the case, we now keep the default value of 0.

Signed-off-by: Wolfgang Grandegger <wg@aries-embedded.de>
1 file changed