Split miscutils/Config.src items into miscutils/*.c files

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/flash_eraseall.c

@@ -9,6 +9,12 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config FLASH_ERASEALL
+//config:	bool "flash_eraseall"
+//config:	default n  # doesn't build on Ubuntu 8.04
+//config:	help
+//config:	  The flash_eraseall binary from mtd-utils as of git head c4c6a59eb.
+//config:	  This utility is used to erase the whole MTD device.
 
 //usage:#define flash_eraseall_trivial_usage
 //usage:       "[-jNq] MTD_DEVICE"