MIPS: smp-mt: Use common GIC IPI implementation

Rather than duplicating the GIC IPI send function, share the one already
used by CONFIG_MIPS_CPS & CONFIG_MIPS_CMP.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/6653/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -1918,6 +1918,7 @@ config MIPS_MT_SMP
 	select CPU_MIPSR2_IRQ_VI
 	select CPU_MIPSR2_IRQ_EI
 	select SYNC_R4K
+	select MIPS_GIC_IPI
 	select MIPS_MT
 	select SMP
 	select SMP_UP

arch/mips/kernel/smp-mt.c

@@ -113,27 +113,6 @@ static void __init smvp_tc_init(unsigned int tc, unsigned int mvpconf0)
 	write_tc_c0_tchalt(TCHALT_H);
 }
 
-#ifdef CONFIG_IRQ_GIC
-static void mp_send_ipi_single(int cpu, unsigned int action)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-
-	switch (action) {
-	case SMP_CALL_FUNCTION:
-		gic_send_ipi(plat_ipi_call_int_xlate(cpu));
-		break;
-
-	case SMP_RESCHEDULE_YOURSELF:
-		gic_send_ipi(plat_ipi_resched_int_xlate(cpu));
-		break;
-	}
-
-	local_irq_restore(flags);
-}
-#endif
-
 static void vsmp_send_ipi_single(int cpu, unsigned int action)
 {
 	int i;
@@ -142,7 +121,7 @@ static void vsmp_send_ipi_single(int cpu, unsigned int action)
 
 #ifdef CONFIG_IRQ_GIC
 	if (gic_present) {
-		mp_send_ipi_single(cpu, action);
+		gic_send_ipi_single(cpu, action);
 		return;
 	}
 #endif