powerpc/pseries: Remove MPIC from pseries smp

MPIC was only used by Power3 which is now unsupported, so remove MPIC
code. XICS is now the only supported interrupt controller for
pSeries so do some cleanups too.

Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 39f21fb..4b94a1e 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -437,7 +437,7 @@
 
 	/* Discover PIC type and setup ppc_md accordingly */
 	setup_kexec_cpu_down_xics();
-	smp_init_pseries_xics();
+	smp_init_pseries();
 
 
 	/* openpic global configuration register (64-bit format). */