video: fbdev: mmp: add COMPILE_TEST support

Add COMPILE_TEST support to mmp display subsystem for better compile
testing coverage.
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d21a19ea-8c18-80df-ae79-76de7c5ee67c@samsung.com

drivers/video/fbdev/mmp/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig MMP_DISP
 	tristate "Marvell MMP Display Subsystem support"
-	depends on CPU_PXA910 || CPU_MMP2
+	depends on CPU_PXA910 || CPU_MMP2 || COMPILE_TEST
 	help
 	  Marvell Display Subsystem support.
 

drivers/video/fbdev/mmp/hw/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 config MMP_DISP_CONTROLLER
 	bool "mmp display controller hw support"
-	depends on CPU_PXA910 || CPU_MMP2
+	depends on HAVE_CLK && HAS_IOMEM
+	depends on CPU_PXA910 || CPU_MMP2 || COMPILE_TEST
 	help
 		Marvell MMP display hw controller support
 		this controller is used on Marvell PXA910 and