board: ti: j721e: Guard functions with right #ifdef to avoid build warnings

board_late_init(), setup_board_eeprom_env() and setup_serial() is
called only under CONFIG_BOARD_LATE_INIT, so guard these functions
with the same. Also, reorder these functions to place it under
single #ifdef

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
diff --git a/board/ti/j721e/evm.c b/board/ti/j721e/evm.c
index ad85b9d..e15ab76 100644
--- a/board/ti/j721e/evm.c
+++ b/board/ti/j721e/evm.c
@@ -172,45 +172,6 @@
 	return 0;
 }
 
-static void setup_board_eeprom_env(void)
-{
-	char *name = "j721e";
-
-	if (do_board_detect())
-		goto invalid_eeprom;
-
-	if (board_is_j721e_som())
-		name = "j721e";
-	else if (board_is_j7200_som())
-		name = "j7200";
-	else
-		printf("Unidentified board claims %s in eeprom header\n",
-		       board_ti_get_name());
-
-invalid_eeprom:
-	set_board_info_env_am6(name);
-}
-
-static void setup_serial(void)
-{
-	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
-	unsigned long board_serial;
-	char *endp;
-	char serial_string[17] = { 0 };
-
-	if (env_get("serial#"))
-		return;
-
-	board_serial = hextoul(ep->serial, &endp);
-	if (*endp != '\0') {
-		pr_err("Error: Can't set serial# to %s\n", ep->serial);
-		return;
-	}
-
-	snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
-	env_set("serial#", serial_string);
-}
-
 /*
  * Declaration of daughtercards to probe. Note that when adding more
  * cards they should be grouped by the 'i2c_addr' field to allow for a
@@ -447,6 +408,46 @@
 		printf("phy_power_on failed !!\n");
 }
 
+#ifdef CONFIG_BOARD_LATE_INIT
+static void setup_board_eeprom_env(void)
+{
+	char *name = "j721e";
+
+	if (do_board_detect())
+		goto invalid_eeprom;
+
+	if (board_is_j721e_som())
+		name = "j721e";
+	else if (board_is_j7200_som())
+		name = "j7200";
+	else
+		printf("Unidentified board claims %s in eeprom header\n",
+		       board_ti_get_name());
+
+invalid_eeprom:
+	set_board_info_env_am6(name);
+}
+
+static void setup_serial(void)
+{
+	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+	unsigned long board_serial;
+	char *endp;
+	char serial_string[17] = { 0 };
+
+	if (env_get("serial#"))
+		return;
+
+	board_serial = hextoul(ep->serial, &endp);
+	if (*endp != '\0') {
+		pr_err("Error: Can't set serial# to %s\n", ep->serial);
+		return;
+	}
+
+	snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
+	env_set("serial#", serial_string);
+}
+
 int board_late_init(void)
 {
 	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
@@ -465,6 +466,7 @@
 
 	return 0;
 }
+#endif
 
 void spl_board_init(void)
 {