media: meye: allow building it with COMPILE_TEST on non-x86

This driver depends on sony-laptop driver, but this is available
only for x86. So, add a stub function, in order to allow building
it on non-x86 too.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/pci/meye/Kconfig

 config VIDEO_MEYE
 	tristate "Sony Vaio Picturebook Motion Eye Video For Linux"
-	depends on PCI && SONY_LAPTOP && VIDEO_V4L2
+	depends on PCI && VIDEO_V4L2
+	depends on SONY_LAPTOP || COMPILE_TEST
 	---help---
 	  This is the video4linux driver for the Motion Eye camera found
 	  in the Vaio Picturebook laptops. Please read the material in

include/linux/sony-laptop.h

@@ -28,7 +28,11 @@
 #define SONY_PIC_COMMAND_GETCAMERAROMVERSION	18	/* obsolete */
 #define SONY_PIC_COMMAND_GETCAMERAREVISION	19	/* obsolete */
 
+#if IS_ENABLED(CONFIG_SONY_LAPTOP)
 int sony_pic_camera_command(int command, u8 value);
+#else
+static inline int sony_pic_camera_command(int command, u8 value) { return 0; };
+#endif
 
 #endif	/* __KERNEL__ */