sunxi: Increase command line buffer size (CONFIG_SYS_CBSIZE)

I was running into this limit with a not overly long PXE append line.

Since the PXE code wants to print the resulting command line increase
CONFIG_SYS_PBSIZE too.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>

include/configs/sunxi-common.h

@@ -95,8 +95,8 @@
  * Miscellaneous configurable options
  */
 #define CONFIG_CMD_ECHO
-#define CONFIG_SYS_CBSIZE	256	/* Console I/O Buffer Size */
-#define CONFIG_SYS_PBSIZE	384	/* Print Buffer Size */
+#define CONFIG_SYS_CBSIZE	1024	/* Console I/O Buffer Size */
+#define CONFIG_SYS_PBSIZE	1024	/* Print Buffer Size */
 #define CONFIG_SYS_MAXARGS	16	/* max number of command args */
 #define CONFIG_SYS_GENERIC_BOARD