[EXT] [PATCH 7/9] pdcp: use C11 alignof

[Anoob Joseph]

> 
> External Email
> 
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> Replace use of __alignof__(T) with C11 alignof(T) to improve portability
> between toolchains.
> 
> Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>

Acked-by: Anoob Joseph <anoobj at marvell.com>