[PATCH] [ARM]: Add support for MMFR4_EL1 (memory model feature register) in assembler.

[Javed Absar]

Hi Tim :
I abandoned this review (forgot to add llvm-commits in subscribers) and instead created a new one: http://reviews.llvm.org/D10275. 
Could you please LGTM that if its ok (its identical to this one except for subscribers lists).
Thanks.


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http://reviews.llvm.org/D10274

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