gpu: ipu-v3: allow to build with COMPILE_TEST

Add missing include <linux/sizes.h> in ipu-cpmem and ipu-ic, select
BITREVERSE for ipu-cpmem and GENERIC_ALLOCATOR for ipu-pre, and allow
to build if COMPILE_TEST is enabled.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/ipu-v3/Kconfig

 config IMX_IPUV3_CORE
 	tristate "IPUv3 core support"
-	depends on SOC_IMX5 || SOC_IMX6Q || ARCH_MULTIPLATFORM
+	depends on SOC_IMX5 || SOC_IMX6Q || ARCH_MULTIPLATFORM || COMPILE_TEST
 	depends on DRM || !DRM # if DRM=m, this can't be 'y'
+	select BITREVERSE
+	select GENERIC_ALLOCATOR if DRM
 	select GENERIC_IRQ_CHIP
 	help
 	  Choose this if you have a i.MX5/6 system and want to use the Image

drivers/gpu/ipu-v3/ipu-cpmem.c

@@ -12,6 +12,7 @@
 #include <linux/types.h>
 #include <linux/bitrev.h>
 #include <linux/io.h>
+#include <linux/sizes.h>
 #include <drm/drm_fourcc.h>
 #include "ipu-prv.h"
 

drivers/gpu/ipu-v3/ipu-ic.c

@@ -17,6 +17,7 @@
 #include <linux/bitrev.h>
 #include <linux/io.h>
 #include <linux/err.h>
+#include <linux/sizes.h>
 #include "ipu-prv.h"
 
 /* IC Register Offsets */