spapr: Remove stale comment about power-saving LPCR bits

Commit 47a9b55154 ("spapr: Clean up handling of LPCR power-saving exit
bits") moved this logic but did not remove the comment from the
previous location.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20210526091626.3388262-2-npiggin@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr_rtas.c

@@ -164,7 +164,6 @@ static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
     env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
     hreg_compute_hflags(env);
 
-    /* Enable Power-saving mode Exit Cause exceptions for the new CPU */
     lpcr = env->spr[SPR_LPCR];
     if (!pcc->interrupts_big_endian(callcpu)) {
         lpcr |= LPCR_ILE;