[PATCH] Correct syntax of ARM mrc, mrc2 when writing to APSR

[Mihail Popa]

Hello. Please review the attached patch.

The purpose of the patch is to fix the syntax of ARM mrc and mrc2 
instructions when they are used to write to the APSR. In this case, the 
destination operand should be APSR_nzcv, and the encoding of the target 
should be 0b1111 (same as for PC). In pre-UAL syntax, this form used the 
PC register as a textual target. This is still allowed for backward 
compatibility.

Thanks,
Mihai
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