arm: socfpga: stratix10: Add CONFIG_OF_EMBED

The dtb should be embedded in the u-boot-spl image so that
the CONFIG_SPL_TARGET of spl/u-boot-spl.hex includes it.

This also affects the main u-boot image, so adjust
CONFIG_SPL_FS_LOAD_PAYLOAD_NAME to u-boot.img which now
also includes the dtb.

Signed-off-by: Dalon Westergreen <dwesterg@gmail.com>

configs/socfpga_stratix10_defconfig

@@ -26,6 +26,7 @@ CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_OF_EMBED=y
 CONFIG_DEFAULT_DEVICE_TREE="socfpga_stratix10_socdk"
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_NET_RANDOM_ETHADDR=y

include/configs/socfpga_stratix10_socdk.h

@@ -216,6 +216,6 @@ unsigned int cm_get_l4_sys_free_clk_hz(void);
 
 /* SPL SDMMC boot support */
 #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
-#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME		"u-boot-dtb.img"
+#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME		"u-boot.img"
 
 #endif	/* __CONFIG_H */