mmc: fix cb710 kconfig dependency warning

Fix kconfig dependency warning to satisfy dependencies:

  warning: (MMC_CB710 && MMC && PCI) selects CB710_CORE which has
  unmet direct dependencies (MISC_DEVICES && PCI)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/Kconfig

@@ -395,6 +395,7 @@ config MMC_TMIO
 config MMC_CB710
 	tristate "ENE CB710 MMC/SD Interface support"
 	depends on PCI
+	select MISC_DEVICES
 	select CB710_CORE
 	help
 	  This option enables support for MMC/SD part of ENE CB710/720 Flash