The last user of ppc_md.idle_loop() was removed when we dropped the
legacy iSeries code, in commit 
8ee3e0d.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
                                                unsigned long size,
                                                pgprot_t vma_prot);
 
-       /* Idle loop for this platform, leave empty for default idle loop */
-       void            (*idle_loop)(void);
-
        /*
         * Function for waiting for work with reduced power in idle loop;
         * called with interrupts disabled.
 
  */
 void cpu_idle(void)
 {
-       if (ppc_md.idle_loop)
-               ppc_md.idle_loop();     /* doesn't return */
-
        set_thread_flag(TIF_POLLING_NRFLAG);
        while (1) {
                tick_nohz_idle_enter();