staging: r8188eu: remove ODM_delay_us()

ODM_delay_us() is just a wrapper around udelay().
Remove ODM_delay_us() and call udelay() directly.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20211229205108.26373-10-straube.linux@gmail.com


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