* sysdeps/unix/sysv/linux/powerpc/pread.c: Do not use the i386 version.
Instead call the system call wrapper function using an 64bit argument.
* sysdeps/unix/sysv/linux/powerpc/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/pwrite64.c: Likewise.