sunxi: Enable pre-console buffer

This allows to always have a complete log on the VGA/HDMI/LCD console.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

include/configs/sunxi-common.h

@@ -272,6 +272,12 @@
 #ifndef CONFIG_SPL_BUILD
 #include <config_distro_defaults.h>
 
+/* Enable pre-console buffer to get complete log on the VGA console */
+#define CONFIG_PRE_CONSOLE_BUFFER
+#define CONFIG_PRE_CON_BUF_SZ		(1024 * 1024)
+/* Use the room between the end of bootm_size and the framebuffer */
+#define CONFIG_PRE_CON_BUF_ADDR		0x4f000000
+
 /*
  * 240M RAM (256M minimum minus space for the framebuffer),
  * 32M uncompressed kernel, 16M compressed kernel, 1M fdt,