powerpc/corenet: use the mixed mode of MPIC when enabling CPU hotplug

Core reset may cause issue if using the proxy mode of MPIC.
Use the mixed mode of MPIC if enabling CPU hotplug.
Signed-off-by: NChenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

arch/powerpc/platforms/85xx/corenet_generic.c

@@ -214,7 +214,15 @@ define_machine(corenet_generic) {
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 #endif
+/*
+ * Core reset may cause issue if using the proxy mode of MPIC.
+ * So, use the mixed mode of MPIC if enabling CPU hotplug.
+ */
+#ifdef CONFIG_HOTPLUG_CPU
+	.get_irq		= mpic_get_irq,
+#else
 	.get_irq		= mpic_get_coreint_irq,
+#endif
 	.restart		= fsl_rstcr_restart,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,