sh: Add export.h to arch/sh specific files as required.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 194231c..c2691af 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -20,6 +20,7 @@
 #include <linux/io.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
+#include <linux/export.h>
 
 unsigned long PCIBIOS_MIN_IO = 0x0000;
 unsigned long PCIBIOS_MIN_MEM = 0;