atm: eni: Move semicolon to a new line after empty for loop

Clang warns:

drivers/atm/eni.c:244:48: error: for loop has empty body
[-Werror,-Wempty-body]
        for (order = 0; (1 << order) < *size; order++);
                                                      ^
drivers/atm/eni.c:244:48: note: put the semicolon on a separate line to
silence this warning

In this case, that loop is expected to be empty so silence the warning
in the way that Clang suggests.

Link: ClangBuiltLinux#42
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

drivers/atm/eni.c

@@ -241,7 +241,8 @@ static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 	len = eni_dev->free_len;
 	if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 	if (*size > MID_MAX_BUF_SIZE) return NULL;
-	for (order = 0; (1 << order) < *size; order++);
+	for (order = 0; (1 << order) < *size; order++)
+		;
 	DPRINTK("trying: %ld->%d\n",*size,order);
 	best_order = 65; /* we don't have more than 2^64 of anything ... */
 	index = 0; /* silence GCC */