MindSensors PSP-Nx constants

PSP_CMD_ANALOG PSP_CMD_DIGITAL PSP_REG_BTNSET1 PSP_REG_BTNSET2 PSP_REG_XLEFT PSP_REG_XRIGHT PSP_REG_YLEFT PSP_REG_YRIGHT

#define PSP_REG_BTNSET2   0x43 The PSP-Nx button set 2 register