Tegra186: fix recursion in included headers (tegra_def.h/platform_def.h)

This patch fixes the "Recursion in included headers" error flagged by
Coverity.

Fixes coverity errors "31858: Recursion in included headers" and
"31857: Recursion in included headers"

Change-Id: Icf8838434b1808b396e743e47f59adc452546364
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t186/drivers/smmu/smmu.c b/plat/nvidia/tegra/soc/t186/drivers/smmu/smmu.c
index 7f45895..d1e1804 100644
--- a/plat/nvidia/tegra/soc/t186/drivers/smmu/smmu.c
+++ b/plat/nvidia/tegra/soc/t186/drivers/smmu/smmu.c
@@ -29,6 +29,7 @@
  */
 
 #include <assert.h>
+#include <bl_common.h>
 #include <debug.h>
 #include <memctrl_v2.h>
 #include <platform_def.h>