mmc: Add module.h to drivers/mmc users assuming implicit presence.

We are cleaning up the implicit presence of module.h; these guys are
some of the people who just assume it will be there.  Call it out
explitly for those that really need it.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

drivers/mmc/host/sdhci-tegra.c

@@ -13,6 +13,7 @@
  */
 
 #include <linux/err.h>
+#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>