disk/iso: Add Support for block sizes > 512 byte to ISO partition support

For ISO we check the block size of the device if this is != the CD sector
size we assume that the device has no ISO partition.

Signed-off-by: Egbert Eich <eich@suse.com>
diff --git a/include/common.h b/include/common.h
index 84315a0..fd2495f 100644
--- a/include/common.h
+++ b/include/common.h
@@ -1032,7 +1032,7 @@
  */
 #define DEFINE_ALIGN_BUFFER(type, name, size, align)			\
 	static char __##name[roundup(size * sizeof(type), align)]	\
-			__attribute__((aligned(align)));				\
+			__aligned(align);				\
 									\
 	static type *name = (type *)__##name
 #define DEFINE_CACHE_ALIGN_BUFFER(type, name, size)			\