xilinx: Align defconfig with current Kconfig order

Keep all defconfig sorted to ensure the smallest diff.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/zynq_zybo_defconfig b/configs/zynq_zybo_defconfig
index 0988350..c6f76e7 100644
--- a/configs/zynq_zybo_defconfig
+++ b/configs/zynq_zybo_defconfig
@@ -35,8 +35,8 @@
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y
-CONFIG_MMC_SDHCI_ZYNQ=y
 CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_ZYNQ=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y