[Ryujit/ARM32] Update unassignPhysReg() for TYP_DOUBLE
[Ryujit/ARM32] Update unassignPhysReg() for TYP_DOUBLE

* Refactor code
* Clear intervals of both reigsters for TYP_DOUBLE

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

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