staging: r8188eu: Replace a custom function with crc32_le()

Use crc32_le() in place of the custom getcrc32().

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210730103716.27210-2-fmdefrancesco@gmail.com


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