i8259: Fix PIC_COMMON() macro

It used a wrong struct type name since its introduction in
8f04ee08 (isa: pic: convert to QEMU
Object Model), apparently it is unused so far.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/i8259_internal.h

@@ -33,7 +33,7 @@ typedef struct PICCommonState PICCommonState;
 
 #define TYPE_PIC_COMMON "pic-common"
 #define PIC_COMMON(obj) \
-     OBJECT_CHECK(PICCommon, (obj), TYPE_PIC_COMMON)
+     OBJECT_CHECK(PICCommonState, (obj), TYPE_PIC_COMMON)
 #define PIC_COMMON_CLASS(klass) \
      OBJECT_CLASS_CHECK(PICCommonClass, (klass), TYPE_PIC_COMMON)
 #define PIC_COMMON_GET_CLASS(obj) \