spi: Add module.h to implicit users in drivers/spi

We are clipping down the presence of module.h, since it was
everywhere.  If you really need it, you better call it out,
as per this changeset.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index 9421a39..13448c8 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/orion_spi.h>
+#include <linux/module.h>
 #include <asm/unaligned.h>
 
 #define DRIVER_NAME			"orion_spi"