[POWERPC] iSeries: fix time.c for combined build

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/kernel/time.c

@@ -631,7 +631,8 @@ void timer_interrupt(struct pt_regs * regs)
 	calculate_steal_time();
 
 #ifdef CONFIG_PPC_ISERIES
-	get_lppaca()->int_dword.fields.decr_int = 0;
+	if (firmware_has_feature(FW_FEATURE_ISERIES))
+		get_lppaca()->int_dword.fields.decr_int = 0;
 #endif
 
 	while ((ticks = tb_ticks_since(per_cpu(last_jiffy, cpu)))
@@ -674,7 +675,7 @@ void timer_interrupt(struct pt_regs * regs)
 	set_dec(next_dec);
 
 #ifdef CONFIG_PPC_ISERIES
-	if (hvlpevent_is_pending())
+	if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())
 		process_hvlpevents();
 #endif
 
@@ -774,7 +775,7 @@ int do_settimeofday(struct timespec *tv)
 	 * settimeofday to perform this operation.
 	 */
 #ifdef CONFIG_PPC_ISERIES
-	if (first_settimeofday) {
+	if (firmware_has_feature(FW_FEATURE_ISERIES) && first_settimeofday) {
 		iSeries_tb_recal();
 		first_settimeofday = 0;
 	}