Changed behaviour for swap macros so it uses built in functions for gnu c and visual c++. Should technically be a bit faster.

git-svn-id: svn+ssh://svn.code.sf.net/p/yabause/code/trunk@3159 d7be59e3-070e-4b9a-85a1-4646befae34d
Changed T1ReadWord/T1WriteWord so it uses new macro BSWAP16L that only swaps the lower 2 bytes. Should be faster on non-psp code.

git-svn-id: svn+ssh://svn.code.sf.net/p/yabause/code/trunk@3160 d7be59e3-070e-4b9a-85a1-4646befae34d