arm: zynq: Enable BLK when needed

There is no reason to enable BLK by default for all boards which is just
increasing memory footprint for memory contrained boards like cse.
zc770s are also saving some space.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/Kconfig

@@ -788,7 +788,6 @@ config ARCH_ZYNQ
 	select DM_SPI_FLASH
 	select SPL_SEPARATE_BSS if SPL
 	select DM_USB if USB
-	select BLK
 	select CLK
 	select SPL_CLK if SPL
 	select CLK_ZYNQ

configs/zynq_cse_qspi_defconfig

@@ -48,7 +48,6 @@ CONFIG_OF_EMBED=y
 # CONFIG_DM_WARN is not set
 # CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_SPL_DM_SEQ_ALIAS=y
-# CONFIG_SPL_BLK is not set
 # CONFIG_ZYNQ_GPIO is not set
 # CONFIG_MMC is not set
 CONFIG_SPI_FLASH=y

configs/zynq_zc770_xm011_defconfig

@@ -28,6 +28,7 @@ CONFIG_CMD_NAND_LOCK_UNLOCK=y
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_CACHE=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_BLK=y
 CONFIG_FPGA_XILINX=y
 # CONFIG_MMC is not set
 CONFIG_NAND=y

configs/zynq_zc770_xm012_defconfig

@@ -30,6 +30,7 @@ CONFIG_CMD_CACHE=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_BLK=y
 CONFIG_FPGA_XILINX=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y

configs/zynq_zc770_xm013_defconfig

@@ -29,6 +29,7 @@ CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_BLK=y
 CONFIG_FPGA_XILINX=y
 # CONFIG_MMC is not set
 CONFIG_SPI_FLASH=y