sad, i can´t get the ps4 to swap the default keys too. Only with that lines it works, but don´t swap buttons.
[vid=0x054c,pid=0x05c4]
[Gamepad]
VPAD_BUTTON_A=VPAD_BUTTON_B
VPAD_BUTTON_B=VPAD_BUTTON_A
and the vid and pid are correct, i can confirm it at hidtest