eb_cpu5282: fix CONFIG_DM_VIDEO build warnings

Remove CONFIG_VIDEO dependency to fix board removal warnings.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Jens Scharsig <esw@bus-elektronik.de>
diff --git a/board/BuS/eb_cpu5282/eb_cpu5282.c b/board/BuS/eb_cpu5282/eb_cpu5282.c
index 1d05e40..f5e4de3 100644
--- a/board/BuS/eb_cpu5282/eb_cpu5282.c
+++ b/board/BuS/eb_cpu5282/eb_cpu5282.c
@@ -20,7 +20,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#ifdef CONFIG_VIDEO
+#if IS_ENABLED(CONFIG_VIDEO_VCXK)
 unsigned long display_width;
 unsigned long display_height;
 #endif
@@ -183,8 +183,7 @@
 		MCFGPTA_GPTPORT &= ~(1 << 3);
 }
 
-#if defined(CONFIG_VIDEO)
-
+#if IS_ENABLED(CONFIG_VIDEO_VCXK)
 int drv_video_init(void)
 {
 	char *s;
@@ -225,7 +224,7 @@
 
 /*---------------------------------------------------------------------------*/
 
-#ifdef CONFIG_VIDEO
+#if IS_ENABLED(CONFIG_VIDEO_VCXK)
 int do_brightness(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	int rcode = 0;