mfd: altera-a10sr: Include linux/module.h

Without the header, the MODULE_DEVICE_TABLE() declaration fails:

drivers/mfd/altera-a10sr.c:153:1: error: data definition has no type or storage class [-Werror]
  153 | MODULE_DEVICE_TABLE(of, altr_a10sr_spi_of_match);

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211013144402.2292128-1-arnd@kernel.org

drivers/mfd/altera-a10sr.c

@@ -14,6 +14,7 @@
 #include <linux/mfd/altera-a10sr.h>
 #include <linux/mfd/core.h>
 #include <linux/init.h>
+#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/spi/spi.h>