cmd: Drop use of HAVE_BLOCK_DEVICE

This condition is not needed for these commands, since BLK is enabled for
all boards which use block devices and commands are not available in SPL,
so even if SPL_BLK is not enabled, it doesn't affect commands.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Makefile b/cmd/Makefile
index 0ef4e2e..cf6ce1b 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -18,7 +18,7 @@
 obj-$(CONFIG_CMD_AB_SELECT) += ab_select.o
 obj-$(CONFIG_CMD_ADC) += adc.o
 obj-$(CONFIG_CMD_ARMFLASH) += armflash.o
-obj-$(CONFIG_HAVE_BLOCK_DEVICE) += blk_common.o
+obj-$(CONFIG_BLK) += blk_common.o
 obj-$(CONFIG_CMD_BOOTDEV) += bootdev.o
 obj-$(CONFIG_CMD_BOOTFLOW) += bootflow.o
 obj-$(CONFIG_CMD_BOOTMETH) += bootmeth.o