misc: mic: move to its own menu in Misc devices

Move the Intel MIC drivers into their own menu.
This is due to the number of drivers (Kconfig entries) here
and it simplifies (cleans up) the "Misc devices" menu.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Sudeep Dutt <sudeep.dutt@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>