Staging: rtl8192e: fixed a function prototype definition issue

Added the identifier name in the function prototype definition.

Signed-off-by: Abhinav Jain <crazypsychild@gmail.com>
Link: https://lore.kernel.org/r/20190726190146.10875-1-ubuntu@ip-172-31-129-142.ec2.internal


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