cpumask: arch_send_call_function_ipi_mask: mips

We're weaning the core code off handing cpumask's around on-stack.
This introduces arch_send_call_function_ipi_mask(), and by defining
it, the old arch_send_call_function_ipi is defined by the core code.

We also take the chance to wean the implementations off the
obsolescent for_each_cpu_mask(): making send_ipi_mask take the pointer
seemed the most natural way to ensure all implementations used
for_each_cpu.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/arch/mips/mipssim/sim_smtc.c b/arch/mips/mipssim/sim_smtc.c
index d6e4f65..5da30b6 100644
--- a/arch/mips/mipssim/sim_smtc.c
+++ b/arch/mips/mipssim/sim_smtc.c
@@ -43,11 +43,12 @@
 	/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
 }
 
-static inline void ssmtc_send_ipi_mask(cpumask_t mask, unsigned int action)
+static inline void ssmtc_send_ipi_mask(const struct cpumask *mask,
+				       unsigned int action)
 {
 	unsigned int i;
 
-	for_each_cpu_mask(i, mask)
+	for_each_cpu(i, mask)
 		ssmtc_send_ipi_single(i, action);
 }