fs/squashfs: use lldiv function for math

When compling for x86:
u-boot/fs/squashfs/sqfs.c:90: undefined reference to `__udivmoddi4'

Signed-off-by: Kasper Revsbech <kasper.revsbech.ext@siemensgamesa.com>
Tested-by: Sean Nyekjaer <sean@geanix.com>
diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index 74ca70c..4226621 100644
--- a/fs/squashfs/sqfs.c
+++ b/fs/squashfs/sqfs.c
@@ -87,7 +87,7 @@
 	u64 start_, table_size;
 
 	table_size = le64_to_cpu(end) - le64_to_cpu(start);
-	start_ = le64_to_cpu(start) / ctxt.cur_dev->blksz;
+	start_ = lldiv(le64_to_cpu(start), ctxt.cur_dev->blksz);
 	*offset = le64_to_cpu(start) - (start_ * ctxt.cur_dev->blksz);
 
 	return DIV_ROUND_UP(table_size + *offset, ctxt.cur_dev->blksz);