ARM: zynq: Convert dlc20 and zc70x board to DM_I2C

All these board have also eeprom enabled that's why it is also enabled
via defconfig.
There is also no need to have zc70x specific config file that's why also
remove it.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/zynq_zc706_defconfig b/configs/zynq_zc706_defconfig
index 626fd69..9da1d54 100644
--- a/configs/zynq_zc706_defconfig
+++ b/configs/zynq_zc706_defconfig
@@ -1,5 +1,4 @@
 CONFIG_ARM=y
-CONFIG_SYS_CONFIG_NAME="zynq_zc70x"
 CONFIG_ARCH_ZYNQ=y
 CONFIG_SYS_TEXT_BASE=0x4000000
 CONFIG_SPL=y
@@ -21,7 +20,6 @@
 CONFIG_SPL_SPI_LOAD=y
 CONFIG_SYS_PROMPT="Zynq> "
 CONFIG_CMD_THOR_DOWNLOAD=y
-CONFIG_CMD_EEPROM=y
 CONFIG_CMD_DFU=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
@@ -46,8 +44,12 @@
 CONFIG_FPGA_XILINX=y
 CONFIG_FPGA_ZYNQPL=y
 CONFIG_DM_GPIO=y
-CONFIG_SYS_I2C_ZYNQ=y
-CONFIG_ZYNQ_I2C0=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_CADENCE=y
+CONFIG_MISC=y
+CONFIG_I2C_EEPROM=y
+CONFIG_SYS_I2C_EEPROM_ADDR=0x0
+CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW=0x0
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_ZYNQ=y
 CONFIG_SPI_FLASH=y