Tegra: SiP: 64-bit address for Video Memory base

This patch allows the NS world to pass 64-bit base address for
the Video Memory carveout region.

Change-Id: I7e47cc1f5425bd39c6763755b801517013e1e0cd
Signed-off-by: Harvey Hsieh <hhsieh@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/tegra_sip_calls.c

@@ -85,7 +85,6 @@ uint64_t tegra_sip_handler(uint32_t smc_fid,
 	case TEGRA_SIP_NEW_VIDEOMEM_REGION:
 
 		/* clean up the high bits */
-		x1 = (uint32_t)x1;
 		x2 = (uint32_t)x2;
 
 		/*