staging: vc04_services: bcm2835-isp: 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 bcm2835-isp instead.

The fix is equivalent to the four patches between 29d49a76c5
("staging: vc04_services: bcm2835-audio: Drop include Makefile
directive")...2529ca211402 ("staging: vc04_services: interface: Drop
include Makefile directive")

Fixes: c8f89c9551c1 ("staging: vc04_services: ISP: Add a more complex ISP processing component")
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

drivers/staging/vc04_services/bcm2835-isp/Makefile

@@ -4,5 +4,4 @@ bcm2835-isp-objs := bcm2835-v4l2-isp.o
 obj-$(CONFIG_VIDEO_ISP_BCM2835) += bcm2835-isp.o
 
 ccflags-y += \
-	-I$(srctree)/drivers/staging/vc04_services \
 	-D__VCCOREVER__=0x04000000

drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h

@@ -12,7 +12,7 @@
 #define BCM2835_ISP_FMTS
 
 #include <linux/videodev2.h>
-#include "vchiq-mmal/mmal-encodings.h"
+#include "../vchiq-mmal/mmal-encodings.h"
 
 struct bcm2835_isp_fmt {
 	u32 fourcc;

drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c

@@ -17,11 +17,11 @@
 #include <media/v4l2-ioctl.h>
 #include <media/videobuf2-dma-contig.h>
 
-#include "vchiq-mmal/mmal-msg.h"
+#include "../vchiq-mmal/mmal-msg.h"
-#include "vchiq-mmal/mmal-parameters.h"
+#include "../vchiq-mmal/mmal-parameters.h"
-#include "vchiq-mmal/mmal-vchiq.h"
+#include "../vchiq-mmal/mmal-vchiq.h"
 
-#include "vc-sm-cma/vc_sm_knl.h"
+#include "../vc-sm-cma/vc_sm_knl.h"
 
 #include "bcm2835-isp-ctrls.h"
 #include "bcm2835-isp-fmts.h"