[PATCH -next] cpuidle: riscv: support non-SMP config

[Randy Dunlap]

Add <asm/smp.h> for cpuid_to_hartid_map etc.
This is needed for both SMP and non-SMP builds, but not having it
causes a build error for non-SMP:

drivers/cpuidle/cpuidle-riscv-sbi.c: In function 'sbi_cpuidle_init_cpu':
drivers/cpuidle/cpuidle-riscv-sbi.c:350:26: error: implicit declaration of function 'cpuid_to_hartid_map' [-Werror=implicit-function-declaration]

Fixes: 6abf32f1d9c5 ("cpuidle: Add RISC-V SBI CPU idle driver")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Anup Patel <anup.patel@xxxxxxx>
Cc: Anup Patel <anup@xxxxxxxxxxxxxx>
Cc: Anup Patel <apatel@xxxxxxxxxxxxxxxx>
Cc: Atish Patra <atishp@xxxxxxxxxxxx>
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: linux-riscv@xxxxxxxxxxxxxxxxxxx
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
---
 drivers/cpuidle/cpuidle-riscv-sbi.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20220401.orig/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ linux-next-20220401/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -22,6 +22,7 @@
 #include <linux/pm_runtime.h>
 #include <asm/cpuidle.h>
 #include <asm/sbi.h>
+#include <asm/smp.h>
 #include <asm/suspend.h>
 
 #include "dt_idle_states.h"