staging: rtl8192e: Remove unnecessary pre-declaration of struct net_device

Remove pre-declaration of struct.

Signed-off-by: Teddy Engel <[e-mail]>
Tested-by: Philipp Hortmann <[e-mail]>
Link: https://lore.kernel.org/r/bb7[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8192e/rtl8192e/rtl_cam.h

···
 #define _RTL_CAM_H
 
 #include <linux/types.h>
-struct net_device;
 
 void rtl92e_cam_reset(struct net_device *dev);
 void rtl92e_enable_hw_security_config(struct net_device *dev);

drivers/staging/rtl8192e/rtl8192e/rtl_pci.h

···
 #include <linux/types.h>
 #include <linux/pci.h>
 
-struct net_device;
 bool rtl92e_check_adapter(struct pci_dev *pdev, struct net_device *dev);
 
 #endif