refactor(arm): use MBEDTLS_CONFIG_FILE macro

Used MBEDTLS_CONFIG_FILE macro for including mbedTLS
configuration.

Signed-off-by: Manish V Badarkhe <manish.badarkhe@arm.com>
Change-Id: I374b59a31df3ab1e69481b2c37a6f7455a106b6e
diff --git a/plat/arm/common/arm_dyn_cfg.c b/plat/arm/common/arm_dyn_cfg.c
index 7abd1cd..83e3f9a 100644
--- a/plat/arm/common/arm_dyn_cfg.c
+++ b/plat/arm/common/arm_dyn_cfg.c
@@ -14,7 +14,7 @@
 #include <common/desc_image_load.h>
 #include <common/tbbr/tbbr_img_def.h>
 #if CRYPTO_SUPPORT
-#include <drivers/auth/mbedtls/mbedtls_config.h>
+#include MBEDTLS_CONFIG_FILE
 #endif /* CRYPTO_SUPPORT */
 #include <lib/fconf/fconf.h>
 #include <lib/fconf/fconf_dyn_cfg_getter.h>