staging: vchi: Get rid of C++ guards

This is an include only used by the Linux kernel, so no need to worry
about C++ compatibility.

Signed-off-by: Nicolas Saenz Julienne <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/vc04_services/interface/vchi/vchi.h

···
  * (local / remote)
  *****************************************************************************/
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 // Routine used to initialise the vchi on both local + remote connections
 extern int32_t vchi_initialise(struct vchi_instance_handle **instance_handle);
 
···
 /******************************************************************************
  * Configuration plumbing
  *****************************************************************************/
-
-#ifdef __cplusplus
-}
-#endif
 
 #endif /* VCHI_H_ */