m68k: Remove M54451EVB board

This board has not been converted to CONFIG_DM_MMC by the deadline.
Remove it.  As this is also the last in family remove the related
support as well.

Cc: Angelo Durgehello <angelo.dureghello@timesys.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/m68k/include/asm/cache.h b/arch/m68k/include/asm/cache.h
index fabec0a..1c04d6d 100644
--- a/arch/m68k/include/asm/cache.h
+++ b/arch/m68k/include/asm/cache.h
@@ -19,9 +19,7 @@
 #define CONFIG_CF_V3
 #endif
 
-#if defined(CONFIG_MCF5445x)
-#define CONFIG_CF_V4
-#elif defined(CONFIG_MCF5441x)
+#if defined(CONFIG_MCF5441x)
 #define CONFIG_CF_V4E		/* Four Extra ACRn */
 #endif