staging: r8188eu: Fix incorrect types in arguments

staging: r8188eu: Fix incorrect types in arguments

GCC + Sparse emit warnings of passing incorrect type in arguments of
some functions because of different base types. Fix them by changing
the types of the parameters of the above-mentioned functions.
In the meantime, remove the unnecessary casts of those arguments
which are then passed to memcpy() within those same functions.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210805131108.19775-1-fmdefrancesco@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>