xilinx: Sync defconfigs with current Kconfig

There are some inconsistencies which should be fixed.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

configs/avnet_ultra96_rev1_defconfig

@@ -20,7 +20,6 @@ CONFIG_SPL_RAM_DEVICE=y
 CONFIG_SPL_ATF=y
 CONFIG_SYS_PROMPT="ZynqMP> "
 CONFIG_CMD_BOOTMENU=y
-CONFIG_CMD_POWEROFF=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_CLK=y
 CONFIG_CMD_DFU=y
@@ -30,6 +29,7 @@ CONFIG_CMD_FPGA_LOADP=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_POWEROFF=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y

configs/microblaze-generic_defconfig

@@ -44,9 +44,9 @@ CONFIG_DM_GPIO=y
 CONFIG_XILINX_GPIO=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
+CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_MTD_DEVICE=y
-CONFIG_MTD_PARTITIONS=y
 CONFIG_PHY_ATHEROS=y
 CONFIG_PHY_BROADCOM=y
 CONFIG_PHY_DAVICOM=y

configs/xilinx_zynqmp_zcu100_revC_defconfig

@@ -20,7 +20,6 @@ CONFIG_SPL_RAM_DEVICE=y
 CONFIG_SPL_ATF=y
 CONFIG_SYS_PROMPT="ZynqMP> "
 CONFIG_CMD_BOOTMENU=y
-CONFIG_CMD_POWEROFF=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_CLK=y
 CONFIG_CMD_DFU=y
@@ -30,6 +29,7 @@ CONFIG_CMD_FPGA_LOADP=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_POWEROFF=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y