staging: r8188eu: don't set pcmd_obj components to 0

pcmd_obj was allocated with kzalloc, its memory is filled with 0s.
There's no need to set rsp and rspsz to NULL or 0 again.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221023170808.46233-3-martin@kaiser.cx


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