staging: vc04_services: vchiq-mmal: 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 mmal-vchiq.c instead.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20230120201104.606876-5-umang.jain@ideasonboard.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/vchiq-mmal/Makefile

@@ -2,7 +2,3 @@
 bcm2835-mmal-vchiq-objs := mmal-vchiq.o
 
 obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += bcm2835-mmal-vchiq.o
-
-ccflags-y += \
-	-I$(srctree)/$(src)/.. \
-	-I$(srctree)/$(src)/../include

drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c

@@ -23,9 +23,9 @@
 #include <linux/slab.h>
 #include <linux/completion.h>
 #include <linux/vmalloc.h>
-#include <linux/raspberrypi/vchiq.h>
 #include <media/videobuf2-vmalloc.h>
 
+#include "../include/linux/raspberrypi/vchiq.h"
 #include "mmal-common.h"
 #include "mmal-vchiq.h"
 #include "mmal-msg.h"