Blackfin: increase default console size

The default console size indirectly applies to length of env vars, so a
smaller length makes it hard to pass longer command lines to kernels.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

include/asm-blackfin/config.h

@@ -120,11 +120,7 @@
 # define CONFIG_SYS_PROMPT "bfin> "
 #endif
 #ifndef CONFIG_SYS_CBSIZE
-# ifdef CONFIG_CMD_KGDB
-#  define CONFIG_SYS_CBSIZE 1024
-# else
-#  define CONFIG_SYS_CBSIZE 256
-# endif
+# define CONFIG_SYS_CBSIZE 1024
 #endif
 #ifndef CONFIG_SYS_BARGSIZE
 # define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE