selftests/vm: fix display of page size in map_hugetlb

The displayed size is in bytes while the text says it is in kB.

Shift it by 10 to really display kBytes.

Fixes: fa7b9a805c79 ("tools/selftest/vm: allow choosing mem size and page size in map_hugetlb")
Signed-off-by: Christophe Leroy <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Cc: <[e-mail]>
Link: https://lkml.kernel.org/r/e2748122[e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

tools/testing/selftests/vm/map_hugetlb.c

···
 	}
 
 	if (shift)
-		printf("%u kB hugepages\n", 1 << shift);
+		printf("%u kB hugepages\n", 1 << (shift - 10));
 	else
 		printf("Default size hugepages\n");
 	printf("Mapping %lu Mbytes\n", (unsigned long)length >> 20);