T1042RDB_PI_NAND_SECURE_BOOT: Guard t104xrdb SPL env code

We can only configure and set the environment in SPL when we have a
particular environment location set that is not "nowhere" like it is in
SECURE_BOOT designs.  Update the code to reflect that.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

board/freescale/t104xrdb/spl.c

@@ -106,6 +106,8 @@ void board_init_r(gd_t *gd, ulong dest_addr)
 #endif
 
 	/* relocate environment function pointers etc. */
+#if defined(CONFIG_ENV_IS_IN_NAND) || defined(CONFIG_ENV_IS_IN_MMC) || \
+	defined(CONFIG_ENV_IS_IN_SPI_FLASH)
 #ifdef CONFIG_SPL_NAND_BOOT
 	nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
 			    (uchar *)CONFIG_ENV_ADDR);
@@ -120,6 +122,7 @@ void board_init_r(gd_t *gd, ulong dest_addr)
 #endif
 	gd->env_addr  = (ulong)(CONFIG_ENV_ADDR);
 	gd->env_valid = ENV_VALID;
+#endif
 
 	i2c_init_all();