microblaze: Enable pselect6 syscall

#define __NR_settimeofday	79 /* ok */

#define __NR_getgroups		80 /* ok */

#define __NR_setgroups		81 /* ok */

#define __NR_select		82 /* obsolete -> sys_pselect7 */

#define __NR_select		82 /* obsolete -> sys_pselect6 */

#define __NR_symlink		83 /* symlinkat */

#define __NR_oldlstat		84 /* remove */

#define __NR_readlink		85 /* obsolete -> sys_readlinkat */

#define __NR_readlinkat		305 /* ok */

#define __NR_fchmodat		306 /* ok */

#define __NR_faccessat		307 /* ok */

#define __NR_pselect6		308 /* obsolete -> sys_pselect7 */

#define __NR_pselect6		308 /* ok */

#define __NR_ppoll		309 /* ok */

#define __NR_unshare		310 /* ok */

#define __NR_set_robust_list	311 /* ok */

	.long sys_readlinkat		/* 305 */

	.long sys_fchmodat

	.long sys_faccessat

	.long sys_ni_syscall /* pselect6 */

	.long sys_pselect6

	.long sys_ppoll

	.long sys_unshare		/* 310 */

	.long sys_set_robust_list