xilinx: Sync defconfigs with the latest Kconfig layout

Update Microblaze, Zynq and ZynqMP defconfigs to reflect
latest Kconfig changes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/zynq_zc770_xm010_defconfig b/configs/zynq_zc770_xm010_defconfig
index 341204e..9664b92 100644
--- a/configs/zynq_zc770_xm010_defconfig
+++ b/configs/zynq_zc770_xm010_defconfig
@@ -1,5 +1,4 @@
 CONFIG_ARM=y
-CONFIG_SYS_CONFIG_NAME="zynq-common"
 CONFIG_ARCH_ZYNQ=y
 CONFIG_DEFAULT_DEVICE_TREE="zynq-zc770-xm010"
 CONFIG_SPL=y
@@ -7,9 +6,9 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_FIT_SIGNATURE=y
 CONFIG_SYS_EXTRA_OPTIONS="ZC770_XM010"
+CONFIG_SYS_NO_FLASH=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
-CONFIG_SYS_NO_FLASH=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y