ARM64: zynqmp: Do not enable DM_MMC by default

The patch:
"dm: mmc: zynq: Convert zynq to use driver model for MMC"
(sha1: 329a449f2c289b4de8f892fca1d9379ce5fd81b8)
added dependency on enabling some MMC options by default.
There are minimal ZynqMP configurations which require
only minimal configurations to be enabled to keep u-boot size
as lower as possible.

Move options to defconfig instead.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_zcu102_defconfig b/configs/xilinx_zynqmp_zcu102_defconfig
index 2c6ceb3..f0378fe 100644
--- a/configs/xilinx_zynqmp_zcu102_defconfig
+++ b/configs/xilinx_zynqmp_zcu102_defconfig
@@ -37,7 +37,9 @@
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_BLK=y
 CONFIG_DM_MMC=y
+CONFIG_DM_MMC_OPS=y
 CONFIG_ZYNQ_SDHCI=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y