sh: Fix CONFIG_PMB=n build.

The last commit introduced the following breakage

arch/sh/include/asm/mmu.h: In function 'pmb_remap':
arch/sh/include/asm/mmu.h:79: error: expected ';' before '}' token

and...

arch/sh/include/asm/mmu.h:78: error: 'EINVAL' undeclared (first use in this function)
arch/sh/include/asm/mmu.h:78: error: (Each undeclared identifier is reported only once
arch/sh/include/asm/mmu.h:78: error: for each function it appears in.)
arch/sh/include/asm/mmu.h: In function 'pmb_init':
arch/sh/include/asm/mmu.h:87: error: 'ENODEV' undeclared (first use in this function)
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/mmu.h

@@ -30,6 +30,7 @@
 #define PMB_NO_ENTRY		(-1)
 
 #ifndef __ASSEMBLY__
+#include <linux/errno.h>
 
 /* Default "unsigned long" context */
 typedef unsigned long mm_context_id_t[NR_CPUS];
@@ -75,7 +76,7 @@ int pmb_init(void);
 static inline long pmb_remap(unsigned long virt, unsigned long phys,
 			     unsigned long size, unsigned long flags)
 {
-	return -EINVAL
+	return -EINVAL;
 }
 
 static inline void pmb_unmap(unsigned long addr)