armv8/ls2085a_emu: Drop DDR3 emulation target

The emulator with DDR3 model was used during model bringup. DDR4
controllers are used with ls2085a. Drop the DDR4 target defconfig
and enable DDR4 in ls2085a_emu_defconfig.

Signed-off-by: York Sun <yorksun@freescale.com>

board/freescale/ls2085a/MAINTAINERS

@@ -4,6 +4,5 @@ S:	Maintained
 F:	board/freescale/ls2085a/
 F:	include/configs/ls2085a_emu.h
 F:	configs/ls2085a_emu_defconfig
-F:	configs/ls2085a_emu_D4_defconfig
 F:	include/configs/ls2085a_simu.h
 F:	configs/ls2085a_simu_defconfig

configs/ls2085a_emu_D4_defconfig

@@ -1,14 +0,0 @@
-CONFIG_ARM=y
-CONFIG_TARGET_LS2085A_EMU=y
-CONFIG_SYS_EXTRA_OPTIONS="EMU,SYS_FSL_DDR4"
-# CONFIG_CMD_CONSOLE is not set
-# CONFIG_CMD_IMLS is not set
-# CONFIG_CMD_XIMG is not set
-# CONFIG_CMD_EDITENV is not set
-# CONFIG_CMD_ENV_EXISTS is not set
-# CONFIG_CMD_LOADS is not set
-# CONFIG_CMD_FPGA is not set
-# CONFIG_CMD_ITEST is not set
-# CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NFS is not set
-# CONFIG_CMD_MISC is not set

configs/ls2085a_emu_defconfig

@@ -1,6 +1,6 @@
 CONFIG_ARM=y
 CONFIG_TARGET_LS2085A_EMU=y
-CONFIG_SYS_EXTRA_OPTIONS="EMU"
+CONFIG_SYS_EXTRA_OPTIONS="EMU,SYS_FSL_DDR4"
 # CONFIG_CMD_CONSOLE is not set
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_XIMG is not set