Fix for bitmap-handling in SADUMP dumpfiles, which associate each bit

in a bitmap with a physical page in the reverse order that is used
in kdump-compressed format.  The bug had not been detected for a long
time because bitmaps in SADUMP formats consist mostly of 0x00 and
0xff excluding a very limited amount of memory space for firmware.
(indou.takao@jp.fujitsu.com, d.hatayama@jp.fujitsu.com)

sadump.c

@@ -715,7 +715,7 @@ is_set_bit(char *bitmap, uint64_t pfn)
 	ulong index, bit;
 
 	index = pfn >> 3;
-	bit = pfn & 7;
+	bit = 7 - (pfn & 7);
 
 	return !!(bitmap[index] & (1UL << bit));
 }