risc-v: cleanup includes and guard

- prototype for ipi_send_target() is in include/smp/ipi.h
- add comment what conditional block ended
- avoid unnecessary includes

Signed-off-by: Axel Heider <axelheider@gmx.de>

include/arch/riscv/arch/smp/ipi.h

@@ -9,6 +9,7 @@
 #include <config.h>
 
 #ifdef ENABLE_SMP_SUPPORT
+
 typedef enum {
     IpiRemoteCall_Stall,
     IpiRemoteCall_switchFpuOwner,
@@ -18,5 +19,5 @@ typedef enum {
 void ipi_send_target(irq_t irq, word_t cpuTargetList);
 irq_t ipi_get_irq(void);
 void  ipi_clear_irq(irq_t irq);
-#endif
 
+#endif /* ENABLE_SMP_SUPPORT */

src/arch/riscv/smp/ipi.c

@@ -5,12 +5,13 @@
  */
 
 #include <config.h>
+
+#ifdef ENABLE_SMP_SUPPORT
+
 #include <mode/smp/ipi.h>
 #include <smp/lock.h>
 #include <util.h>
 
-#ifdef ENABLE_SMP_SUPPORT
-
 /* the remote call being requested */
 static volatile IpiRemoteCall_t  remoteCall;
 static volatile irq_t            ipiIrq[CONFIG_MAX_NUM_NODES];
@@ -88,4 +89,4 @@ void ipi_send_target(irq_t irq, word_t hart_id)
     sbi_send_ipi(hart_mask);
 }
 
-#endif
+#endif /* ENABLE_SMP_SUPPORT */