ARM: socfpga: update CONFIG_SPL_FS_LOAD_PAYLOAD_NAME to u-boot.img

Bring cyclone5 / arria5 / arria10 in line with convention and use
u-boot.img as CONFIG_SPL_FS_LOAD_PAYLOAD_NAME.

Signed-off-by: Dalon Westergreen <dalon.westergreen@intel.com>
diff --git a/include/configs/socfpga_common.h b/include/configs/socfpga_common.h
index d1034ac..36b0ed5 100644
--- a/include/configs/socfpga_common.h
+++ b/include/configs/socfpga_common.h
@@ -203,7 +203,7 @@
 /* SPL SDMMC boot support */
 #ifdef CONFIG_SPL_MMC_SUPPORT
 #if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_FS_EXT4)
-#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME		"u-boot-dtb.img"
+#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME		"u-boot.img"
 #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
 #endif
 #else