xtensa/uapi: Add definition of TIOC[SG]RS485

Commit: e676253b [3/21] serial/8250: Add
support for RS485 IOCTLs, adds support for RS485 ioctls for 825_core on
all the archs. Unfortunaltely the definition of TIOCSRS485 and
TIOCGRS485 was missing on the ioctls.h file
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

arch/xtensa/include/uapi/asm/ioctls.h

@@ -95,6 +95,8 @@
 #define TCSETS2		_IOW('T', 43, struct termios2)
 #define TCSETSW2	_IOW('T', 44, struct termios2)
 #define TCSETSF2	_IOW('T', 45, struct termios2)
+#define TIOCGRS485	_IOR('T', 46, struct serial_rs485)
+#define TIOCSRS485	_IOWR('T', 47, struct serial_rs485)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV	_IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */