eqField对于指针类型数据无法正确校验

[ryanexo]

System (please complete the following information):

• OS: windows 11
• GO Version: 1.2.2
• Pkg Version: latest

Describe the bug

如题，eqField对于指针类型数据无法正确校验，

To Reproduce

type T struct {
    FieldA *string `validate:"required"`
    FieldB *string `validate:"eqField:FieldA"`
}