Both the RiscPC and (optionally) EBSA285 have floppy disk support.  Allow this
option to be selected on these ARM platforms again.
Signed-off-by: NRussell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>