Tegra: allow SiP smc calls from Secure World

This patch removes the restriction of allowing SiP calls only from the
non-secure world. The secure world can issue SiP calls as a result of
this patch now.

Change-Id: Idd64e893ae8e114bba0196872d3ec544cac150bf
Signed-off-by: Wayne Lin <wlin@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/tegra_sip_calls.c

@@ -60,7 +60,7 @@ int plat_sip_handler(uint32_t smc_fid,
 }
 
 /*******************************************************************************
- * This function is responsible for handling all SiP calls from the NS world
+ * This function is responsible for handling all SiP calls
  ******************************************************************************/
 uint64_t tegra_sip_handler(uint32_t smc_fid,
 			   uint64_t x1,
@@ -71,14 +71,8 @@ uint64_t tegra_sip_handler(uint32_t smc_fid,
 			   void *handle,
 			   uint64_t flags)
 {
-	uint32_t ns;
 	int err;
 
-	/* Determine which security state this SMC originated from */
-	ns = is_caller_non_secure(flags);
-	if (!ns)
-		SMC_RET1(handle, SMC_UNK);
-
 	/* Check if this is a SoC specific SiP */
 	err = plat_sip_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags);
 	if (err == 0)