target: msm8994: Add API for ddr config value

For hs400 mode the rclk delay in the ddr config varies
based on the target, add API to return the target specific
ddr config value.

Change-Id: Ibedd30fd56d840c4e3a89f7d75466d5d65e49766
diff --git a/include/target.h b/include/target.h
index ba95cbb..16a4268 100644
--- a/include/target.h
+++ b/include/target.h
@@ -75,4 +75,5 @@
 bool target_is_cdp_qvga();
 uint32_t target_hw_interposer();
 uint32_t target_override_pll();
+uint32_t target_ddr_cfg_val();
 #endif