[ARM] Fix SetDebuggerREGDISPLAYFromREGDISPLAY() function
[ARM] Fix SetDebuggerREGDISPLAYFromREGDISPLAY() function

Use the same logic as in AMD64 code: when setting DebuggerREGDISPLAY from the context,
the context flags might not be initialized. Since it is only called from stackwalker,
we can copy valid integer, control, and floating point sections from the context.

parjong/coreclr,botaberg/coreclr,mmitche/coreclr,krk/coreclr,ruben-ayrapetyan/coreclr,JosephTremoulet/coreclr,hseok-oh/coreclr,parjong/coreclr,kyulee1/coreclr,parjong/coreclr,rartemev/coreclr,hseok-oh/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,rartemev/coreclr,mmitche/coreclr,krk/coreclr,wtgodbe/coreclr,JosephTremoulet/coreclr,botaberg/coreclr,kyulee1/coreclr,parjong/coreclr,wateret/coreclr,ruben-ayrapetyan/coreclr,hseok-oh/coreclr,krk/coreclr,yizhang82/coreclr,parjong/coreclr,krk/coreclr,wtgodbe/coreclr,JosephTremoulet/coreclr,botaberg/coreclr,poizan42/coreclr,wtgodbe/coreclr,poizan42/coreclr,wtgodbe/coreclr,botaberg/coreclr,yizhang82/coreclr,cshung/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,wateret/coreclr,cshung/coreclr,rartemev/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,krk/coreclr,kyulee1/coreclr,mmitche/coreclr,cshung/coreclr,yizhang82/coreclr,rartemev/coreclr,poizan42/coreclr,cshung/coreclr,cshung/coreclr,hseok-oh/coreclr,yizhang82/coreclr,wtgodbe/coreclr,rartemev/coreclr,kyulee1/coreclr,mmitche/coreclr,yizhang82/coreclr,mmitche/coreclr,botaberg/coreclr,ruben-ayrapetyan/coreclr,parjong/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,wateret/coreclr,JosephTremoulet/coreclr,wateret/coreclr,wtgodbe/coreclr,botaberg/coreclr,wateret/coreclr,krk/coreclr,yizhang82/coreclr,cshung/coreclr,kyulee1/coreclr,ruben-ayrapetyan/coreclr,rartemev/coreclr,kyulee1/coreclr,mmitche/coreclr,wateret/coreclr