mmc_spi: Fix unterminated of_match_table

commit 2ffe8c5f323c3b9749bf7bc2375d909d20bdbb15 ("of: refactor
of_modalias_node() and remove explicit match table"), introduced
an unterminated of_match_table, which may cause kernel to oops.

This patch fixes the issue by adding an empty device ID.

Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 7b0f3ef..1145ea0 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1536,6 +1536,7 @@
 #if defined(CONFIG_OF)
 static struct of_device_id mmc_spi_of_match_table[] __devinitdata = {
 	{ .compatible = "mmc-spi-slot", },
+	{},
 };
 #endif