staging: rtl8712: Remove extra spaces

This patch fixes the problem of irregular indentation

Signed-off-by: Shibo Li <zzutcyha@163.com>
Link: https://lore.kernel.org/r/20230220090430.19589-1-zzutcyha@163.com


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