Introduce library with ATSPI access functions (largely untested)

- tools/include/atspi.h, tools/lib/Makefile, tools/lib/atspi.c: library
  with ATSPI access functions
- tools/atspi-id/Makefile: use libatspi
- tools/atspi-id/atspi-id.c (main) use atspi_open instead of open_usb
- fw/atspi/at86rf230.h: moved to fw/include/
- fw/include/at86rf230.h: added ID registers
- fw/atspi/ep0.c: removed stray #endif

fw/atspi/ep0.c

@@ -211,7 +211,6 @@ static __bit my_setup(struct setup_request *setup) __reentrant
 		nSS = 1;
 		usb_send(&ep0, buf, size, NULL, NULL);
 		return 1;
-#endif
 
 	default:
 		error("Unrecognized SETUP: 0x%02x 0x%02x ...\n",

fw/include/at86rf230.h

@@ -26,4 +26,11 @@ enum at86rf230_spi_cmd {
 #define	MAX_PSDU	127	/* octets, see AT86RF230 manual section 8.1  */
 #define	SRAM_SIZE	128
 
+enum at86rf230_regs {
+	AT86RF230_REG_PART_NUM		= 0x1c,
+	AT86RF230_REG_VERSION_NUM	= 0x1d,
+	AT86RF230_REG_MAN_ID_0		= 0x1e,
+	AT86RF230_REG_MAN_ID_1		= 0x1f,
+};
+
 #endif /* !AT86RF230_H */