moved some parameters to defconfig to reduce the number of modified files

u-boot-tree/arch/arm/mach-zynq/Kconfig

-if ARCH_ZYNQ
-
-config TARGET_ELPHEL393
-    bool "Elphel 10393 Zynq Board"
-    default y
-
-config SPL_LDSCRIPT
-	default "arch/arm/mach-zynq/u-boot-spl.lds"
-
-config SPL_FAT_SUPPORT
-	default y
-
-config SPL_LIBCOMMON_SUPPORT
-	default y
-
-config SPL_LIBDISK_SUPPORT
-	default y
-
-config SPL_LIBGENERIC_SUPPORT
-	default y
-
-config SPL_MMC_SUPPORT
-	default y if MMC_SDHCI_ZYNQ
-
-config SPL_SERIAL_SUPPORT
-	default y
-
-config SPL_SPI_FLASH_SUPPORT
-	default y if ZYNQ_QSPI
-
-config SPL_SPI_SUPPORT
-	default y if ZYNQ_QSPI
-
-config ZYNQ_DDRC_INIT
-	bool "Zynq DDRC initialization"
-	default y
-	help
-	  This option used to perform DDR specific initialization
-	  if required. There might be cases like ddr less where we
-	  want to skip ddr init and this option is useful for it.
-
-config SYS_BOARD
-	string "Board name"
-	default "elphel393" if TARGET_ELPHEL393
-	default "zynq"
-
-config SYS_VENDOR
-	string "Vendor name"
-	default "elphel" if TARGET_ELPHEL393
-	default "xilinx"
-
-config SYS_SOC
-	default "zynq"
-
-config SYS_CONFIG_NAME
-	string "Board configuration name"
-	default "elphel393" if TARGET_ELPHEL393
-	default "zynq-common"
-	help
-	  This option contains information about board configuration name.
-	  Based on this option include/configs/<CONFIG_SYS_CONFIG_NAME>.h header
-	  will be used for board configuration.
-
-config SYS_MALLOC_F_LEN
-	default 0x600
-
-config SYS_MALLOC_LEN
-	default 0x1400000
-
-config BOOT_INIT_FILE
-	string "boot.bin init register filename"
-	default ""
-	help
-	  Add register writes to boot.bin format (max 256 pairs).
-	  Expect a table of register-value pairs, e.g. "0x12345678 0x4321"
-
-config ZYNQ_SDHCI_MAX_FREQ
-	default 52000000
-
-endif

u-boot-tree/configs/elphel393_defconfig

 CONFIG_ARM=y
 CONFIG_ARCH_ZYNQ=y
+
+# don't need this
 CONFIG_TARGET_ELPHEL393=y
 CONFIG_DEFAULT_DEVICE_TREE="elphel393"
+
+CONFIG_SYS_BOARD="elphel393"
+CONFIG_SYS_VENDOR="elphel"
+CONFIG_SYS_NAME="elphel393"
+
 CONFIG_SPL=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
@@ -48,3 +55,7 @@ CONFIG_SPL_BLK=y
 
 CONFIG_SPL_DM=y
 CONFIG_BLK=y
+
+#CONFIG_DEBUG_UART_BASE=0xe0001000
+CONFIG_DEBUG_UART_BASE=0xe0000000
+