MIPS: arch_send_call_function_single_ipi() calling conventions change

Use mp_ops->send_ipi_single() instead of mp_ops->send_ipi_mask() in
arch_send_call_function_single_ipi(). send_ipi_single() can send
IPI signal to a special cpu more efficiently.

Signed-off-by: Liangliang Huang <[e-mail]>
Reviewed-by: Huacai Chen <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/include/asm/smp.h

···
 {
 	extern const struct plat_smp_ops *mp_ops;	/* private */
 
-	mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
+	mp_ops->send_ipi_single(cpu, SMP_CALL_FUNCTION);
 }
 
 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)