apalis/colibri_t20/t30: integrate recovery mode detection

Allow detecting whether or not U-Boot was launched through the
recovery mode of the resp. NVIDIA SoC.

Make use of a board specific arch_misc_init() and enable the same via
CONFIG_ARCH_MISC_INIT configuration option.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/include/configs/apalis_t30.h b/include/configs/apalis_t30.h
index bcaea95..7e8ffae 100644
--- a/include/configs/apalis_t30.h
+++ b/include/configs/apalis_t30.h
@@ -11,6 +11,8 @@
 
 #include "tegra30-common.h"
 
+#define CONFIG_ARCH_MISC_INIT
+
 /* High-level configuration options */
 #define CONFIG_TEGRA_BOARD_STRING	"Toradex Apalis T30"