The 'mrs' instruction only deals with the whole register without

The 'mrs' instruction only deals with the whole register without
masking.  Remove the use of cpsr_all/spsr_all with 'mrs' and just use
the register names.  This matches the arm docs and avoids confusion as
cpsr_all/spsr_all don't include bits 23->8 when used with the 'msr'
instruction but do with 'mrs'.