staging: r8188eu: Drop redundant memset overwritten by memcpy

The region set by the call to memset is immediately overwritten by the
subsequent call to memcpy. So we drop redundant memset.

Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Link: https://lore.kernel.org/r/1654084164-10869-1-git-send-email-baihaowen@meizu.com


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