Fixes warning:
```
dolphin/Source/Core/Core/PowerPC/MMU.cpp:278:43: warning: shift count >= width of type [-Wshift-count-overflow]
addr++, addr_translated++, val >>= 8)
```
Fixes warning:
```
dolphin/Source/Core/Core/PowerPC/MMU.cpp:278:43: warning: shift count >= width of type [-Wshift-count-overflow]
addr++, addr_translated++, val >>= 8)
```