net: phy: fix formatting issues with braces

Fix following format issues:
1. open brace '{' following function definitions should go to the next
   line.
2. braces {} are not necessary for single line statements.
3. else should follow close brace '}'.

Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>