staging: r8188eu: remove read_chip_version from hal_ops

Remove read_chip_version from hal_ops and remove its wrapper
rtw_hal_read_chip_version(). Call rtl8188e_read_chip_version()
directly instead

Acked-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210904124033.14244-4-straube.linux@gmail.com


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