Enable printk persist.

Change-Id: I9e5cac4170021cc359d795238777347de38a0e45
diff --git a/arch/arm/configs/bruno_gfhd254_defconfig b/arch/arm/configs/bruno_gfhd254_defconfig
index c9f3af3..0ea14e7 100644
--- a/arch/arm/configs/bruno_gfhd254_defconfig
+++ b/arch/arm/configs/bruno_gfhd254_defconfig
@@ -10,6 +10,7 @@
 CONFIG_CGROUPS=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_PRINTK_PERSIST=y
 CONFIG_EMBEDDED=y
 CONFIG_PERF_EVENTS=y
 CONFIG_SLAB=y