gfch100: add bootlog flags

Change-Id: Ic08ef00d234fb3f852b24f4b922979f8a4d91b88
diff --git a/board/mv_ebu/a38x/mv_main_a38x.c b/board/mv_ebu/a38x/mv_main_a38x.c
index 6c1fc3d..eaef147 100755
--- a/board/mv_ebu/a38x/mv_main_a38x.c
+++ b/board/mv_ebu/a38x/mv_main_a38x.c
@@ -684,6 +684,12 @@
 #endif
 
 #ifdef CONFIG_GFCH100
+	/* extra args for logs */
+	env = getenv("gflogs");
+	if (!env) {
+		setenv("gflogs", "log_buf_len=8388608 bootlog=1M@63M");
+	}
+
 	/* use 'run gpt_init' to initialize the GPT table on the eMMC */
 	env = getenv("gpt_init");
 	if (!env) {
@@ -715,7 +721,7 @@
 			"run gfparams; "
 			"mmc rescan; "
 			"mmc read $loadaddr $gfkernel 0x8000; "
-			"setenv bootargs $console $mtdparts $gfroot $bootargs_extra; "
+			"setenv bootargs $console $mtdparts $gfroot $gflogs $bootargs_extra; "
 			"bootm $loadaddr; "
 		);
 #elif defined(CONFIG_CMD_STAGE_BOOT)