plat: xilinx: zynqmp: Use ARRAY_SIZE wherever possible

To find result count use ARRAY_SIZE for better readability.
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I97201de4d43024e59fa78bd61937c86d47724ab5

plat/xilinx/zynqmp/pm_service/pm_svc_main.c

@@ -423,7 +423,7 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
 	{
 		uint32_t result[4] = {0};
 
-		pm_get_callbackdata(result, (sizeof(result)/sizeof(uint32_t)));
+		pm_get_callbackdata(result, ARRAY_SIZE(result));
 		SMC_RET2(handle,
 			 (uint64_t)result[0] | ((uint64_t)result[1] << 32),
 			 (uint64_t)result[2] | ((uint64_t)result[3] << 32));