xilinx: Show silicon version in SPL

Both Zynq and ZynqMP can show silicon versions in SPL boot flow. It is
useful to be aware.
The patch is also fixing possition of these bits on ZynqMP.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/zynq/board.c

@@ -24,6 +24,9 @@ DECLARE_GLOBAL_DATA_PTR;
 
 int board_init(void)
 {
+	if (IS_ENABLED(CONFIG_SPL_BUILD))
+		printf("Silicon version:\t%d\n", zynq_get_silicon_version());
+
 	return 0;
 }
 

board/xilinx/zynqmp/zynqmp.c

@@ -328,6 +328,7 @@ int board_init(void)
 	if (sizeof(CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE) > 1)
 		zynqmp_pmufw_load_config_object(zynqmp_pm_cfg_obj,
 						zynqmp_pm_cfg_obj_size);
+	printf("Silicon version:\t%d\n", zynqmp_get_silicon_version());
 #else
 	if (CONFIG_IS_ENABLED(DM_I2C) && CONFIG_IS_ENABLED(I2C_EEPROM))
 		xilinx_read_eeprom();