clearfog: Tools for eMMC flashing

the `mmc` enables one to manipulate various low-level eMMC features, and
`dd_rescue` will be very useful for actual flashing (with nice progress
bars, yay!).

Change-Id: Ic2db77c3033173583f25be9c33ae8a0391f0f258
diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index a09bf97..e3cd782 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -28,6 +28,7 @@
 BR2_PACKAGE_LINUX_TOOLS_PERF=y
 BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/common/busybox-config"
 BR2_PACKAGE_E2FSPROGS=y
+BR2_PACKAGE_MMC_UTILS=y
 BR2_PACKAGE_SQUASHFS=y
 BR2_PACKAGE_I2C_TOOLS=y
 BR2_PACKAGE_SPI_TOOLS=y
@@ -35,6 +36,7 @@
 BR2_PACKAGE_OPENSSH=y
 BR2_PACKAGE_BASH=y
 BR2_PACKAGE_INOTIFY_TOOLS=y
+BR2_PACKAGE_DDRESCUE=y
 BR2_PACKAGE_RAUC=y
 BR2_PACKAGE_RAUC_NETWORK=y
 # BR2_PACKAGE_SYSTEMD_HWDB is not set