[U-Boot] [U-Boot,v2,4/6] pe.h: Add characteristics defines

[Alexander Graf]

> This adds characteristics macros as defined by the Microsoft PE
> Format documentation [1].
> 
> [1] https://docs.microsoft.com/zh-cn/windows/desktop/Debug/pe-format
> 
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

Thanks, applied to efi-next

Alex