sh: fixup many sparse errors.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index a4fbf0c..e49cfee 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -194,6 +194,8 @@
 
 #define IO_SPACE_LIMIT 0xffffffff
 
+extern unsigned long generic_io_base;
+
 /*
  * This function provides a method for the generic case where a board-specific
  * ioport_map simply needs to return the port + some arbitrary port base.
@@ -203,8 +205,6 @@
  */
 static inline void __set_io_port_base(unsigned long pbase)
 {
-	extern unsigned long generic_io_base;
-
 	generic_io_base = pbase;
 }