m68k: fix 3 broken boards

Fix eb_cpu5282 and eb_cpu5282_internal unresolved external error.
These boards have video but don't need any ppc related
video_setmem().

Fix M53017EVB moving away embedded env to a different offset,
as in M52277EVB.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
diff --git a/include/configs/M53017EVB.h b/include/configs/M53017EVB.h
index 83ac70f..e3fa856 100644
--- a/include/configs/M53017EVB.h
+++ b/include/configs/M53017EVB.h
@@ -200,7 +200,7 @@
 /* Configuration for environment
  * Environment is embedded in u-boot in the second sector of the flash
  */
-#define CONFIG_ENV_OFFSET		0x8000
+#define CONFIG_ENV_OFFSET		(CONFIG_SYS_FLASH_BASE + 0x40000)
 #define CONFIG_ENV_SIZE			0x1000
 #define CONFIG_ENV_SECT_SIZE		0x8000
 #define CONFIG_ENV_IS_IN_FLASH		1