staging: r8188eu: remove specific device table

This driver implements a mechanism to set additional configuration flags
per supported usb device.

None of the supported devices uses these additional flags. Remove the data
types and the code to process the flags.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211010175204.24029-2-martin@kaiser.cx


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