Remove p{read,write}{v} and fallocate from x86 auto-generation list

With {INLINE,INTERNAL}_SYSCALL macros fixed for 64-bits arguments on x32,
we can remove the p{read,write}{v} from auto-generation list.

Tested on x86_64 and x32.

	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (pread64): Remove.
	(preadv64): Likewise.
	(pwrite64(: Likewise.
	(pwritev64): Likewise.