staging: wfx: remove useless #ifdef

In the old days, this file was shared with other projects. Obviously,
this "#ifdef __KERNEL__" have no reasons to be in the kernel.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220113085524.1110708-8-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_api_general.h

@@ -8,14 +8,8 @@
 #ifndef WFX_HIF_API_GENERAL_H
 #define WFX_HIF_API_GENERAL_H
 
-#ifdef __KERNEL__
 #include <linux/types.h>
 #include <linux/if_ether.h>
-#else
-#include <net/ethernet.h>
-#include <stdint.h>
-#define __packed __attribute__((__packed__))
-#endif
 
 #define HIF_ID_IS_INDICATION      0x80
 #define HIF_COUNTER_MAX           7