sh: trivial build cleanups.

Several errors were spotted during building for custom config (SMP
included). Although SMP still does not compile (no ipi and
__smp_call_function) and does not work, this looks a bit cleaner.
Some other errors obtained via gcc-4.1.0 build.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cf-enabler.c

@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
+#include <linux/interrupt.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 
@@ -149,6 +150,11 @@ static int __init cf_init_se(void)
 	ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
 	return 0;
 }
+#else
+static int __init cf_init_se(void)
+{
+	return -1;
+}
 #endif
 
 int __init cf_init(void)

arch/sh/kernel/cpu/sh4/probe.c

@@ -12,6 +12,7 @@
  */
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/smp.h>
 #include <asm/processor.h>
 #include <asm/cache.h>
 

arch/sh/kernel/smp.c

@@ -10,6 +10,8 @@
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.
  */
+
+#include <linux/err.h>
 #include <linux/cache.h>
 #include <linux/cpumask.h>
 #include <linux/delay.h>