staging: vc04_services: interface: Drop include Makefile directive

Drop the include directive. They can break the build, when one only
wants to build a subdirectory. Replace with "../" for the includes,
in the interface/ files instead.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20230120201104.606876-6-umang.jain@ideasonboard.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/Makefile

@@ -15,5 +15,3 @@ obj-$(CONFIG_SND_BCM2835)		+= bcm2835-audio/
 obj-$(CONFIG_VIDEO_BCM2835)		+= bcm2835-camera/
 obj-$(CONFIG_BCM2835_VCHIQ_MMAL)	+= vchiq-mmal/
 
-ccflags-y += -I $(srctree)/$(src)/include
-

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h

@@ -10,8 +10,8 @@
 #include <linux/kref.h>
 #include <linux/rcupdate.h>
 #include <linux/wait.h>
-#include <linux/raspberrypi/vchiq.h>
 
+#include "../../include/linux/raspberrypi/vchiq.h"
 #include "vchiq_cfg.h"
 
 /* Do this so that we can test-build the code on non-rpi systems */

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h

@@ -5,7 +5,8 @@
 #define VCHIQ_IOCTLS_H
 
 #include <linux/ioctl.h>
-#include <linux/raspberrypi/vchiq.h>
+
+#include "../../include/linux/raspberrypi/vchiq.h"
 
 #define VCHIQ_IOC_MAGIC 0xc4
 #define VCHIQ_INVALID_HANDLE (~0)