staging: rtl8188eu: move defines into the .c file

Some of the defines from usb_ops_linux.h are used only inside
usb_ops_linux.c. Move them to the .c file.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210407170531.29356-4-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>