staging: r8188eu: Fix different base types in assignments and parameters

Fix sparse warnings of different base types in assignments
and in passing function parameters.

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210730181452.23062-1-fmdefrancesco@gmail.com


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