staging: wilc1000: remove spaces around '->'

Delete the space around '->' as it is prohibited and breaks the code.
Checkpatch found this issue.

ERROR: spaces prohibited around that '->'

Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>