pc87312: Drop unused members of PC87312State

Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NBenoît Canet <benoit.canet@nodalink.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

include/hw/isa/pc87312.h

@@ -47,13 +47,10 @@ typedef struct PC87312State {
 
     struct {
         ISADevice *dev;
-        BlockDriverState *drive[2];
-        uint32_t base;
     } fdc;
 
     struct {
         ISADevice *dev;
-        uint32_t base;
     } ide;
 
     MemoryRegion io;