[RyuJIT/ARM32] Unassign double register properly
[RyuJIT/ARM32] Unassign double register properly

In LinearScan::tryAllocateFreeReg(), unassign a double register properly
when a found float register is a part of a double register.

Signed-off-by: Hyung-Kyu Choi <b24f6a1d8ab6a697998e8a2c60eb031a02db5070@samsung.com>

wateret/coreclr,AlexGhiondea/coreclr,JonHanna/coreclr,YongseopKim/coreclr,russellhadley/coreclr,JosephTremoulet/coreclr,YongseopKim/coreclr,yizhang82/coreclr,kyulee1/coreclr,kyulee1/coreclr,JonHanna/coreclr,poizan42/coreclr,yizhang82/coreclr,ragmani/coreclr,mskvortsov/coreclr,mmitche/coreclr,ragmani/coreclr,parjong/coreclr,ragmani/coreclr,parjong/coreclr,AlexGhiondea/coreclr,yizhang82/coreclr,gkhanna79/coreclr,JosephTremoulet/coreclr,cshung/coreclr,kyulee1/coreclr,cydhaselton/coreclr,JosephTremoulet/coreclr,mmitche/coreclr,rartemev/coreclr,tijoytom/coreclr,gkhanna79/coreclr,krk/coreclr,yizhang82/coreclr,poizan42/coreclr,wateret/coreclr,cshung/coreclr,hseok-oh/coreclr,botaberg/coreclr,dpodder/coreclr,ruben-ayrapetyan/coreclr,JonHanna/coreclr,wtgodbe/coreclr,cshung/coreclr,rartemev/coreclr,russellhadley/coreclr,rartemev/coreclr,botaberg/coreclr,mskvortsov/coreclr,dpodder/coreclr,dpodder/coreclr,krk/coreclr,cydhaselton/coreclr,gkhanna79/coreclr,rartemev/coreclr,kyulee1/coreclr,cshung/coreclr,gkhanna79/coreclr,tijoytom/coreclr,krk/coreclr,JonHanna/coreclr,krk/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,ragmani/coreclr,krk/coreclr,ragmani/coreclr,cydhaselton/coreclr,kyulee1/coreclr,ragmani/coreclr,botaberg/coreclr,kyulee1/coreclr,mskvortsov/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,wateret/coreclr,mskvortsov/coreclr,parjong/coreclr,JosephTremoulet/coreclr,dpodder/coreclr,yizhang82/coreclr,cshung/coreclr,mmitche/coreclr,poizan42/coreclr,tijoytom/coreclr,parjong/coreclr,yizhang82/coreclr,cshung/coreclr,wtgodbe/coreclr,russellhadley/coreclr,AlexGhiondea/coreclr,rartemev/coreclr,wateret/coreclr,botaberg/coreclr,wateret/coreclr,gkhanna79/coreclr,AlexGhiondea/coreclr,YongseopKim/coreclr,tijoytom/coreclr,mskvortsov/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,JonHanna/coreclr,AlexGhiondea/coreclr,botaberg/coreclr,YongseopKim/coreclr,wtgodbe/coreclr,hseok-oh/coreclr,krk/coreclr,parjong/coreclr,russellhadley/coreclr,wtgodbe/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,gkhanna79/coreclr,cydhaselton/coreclr,ruben-ayrapetyan/coreclr,YongseopKim/coreclr,mmitche/coreclr,dpodder/coreclr,mmitche/coreclr,tijoytom/coreclr,poizan42/coreclr,tijoytom/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,JosephTremoulet/coreclr,russellhadley/coreclr,ruben-ayrapetyan/coreclr,cydhaselton/coreclr,wtgodbe/coreclr,ruben-ayrapetyan/coreclr,parjong/coreclr,ruben-ayrapetyan/coreclr,botaberg/coreclr,JonHanna/coreclr,russellhadley/coreclr,hseok-oh/coreclr,dpodder/coreclr,hseok-oh/coreclr,wateret/coreclr,rartemev/coreclr,cydhaselton/coreclr