Revert "Revert "mmc: sdio: optimized SDIO IRQ handling for single irq""

This reverts commit 6e611f2b8655684f578cb975fa0ebfd031b45d69.

Change-Id: Iba92244f1646e6fc38b117d16f2bed8cbb2ac329
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 8a0c4d5..aa808dc 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -228,6 +228,7 @@
 	struct sdio_cccr	cccr;		/* common card info */
 	struct sdio_cis		cis;		/* common tuple info */
 	struct sdio_func	*sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */
+	struct sdio_func	*sdio_single_irq; /* SDIO function when only one IRQ active */
 	unsigned		num_info;	/* number of info strings */
 	const char		**info;		/* info strings */
 	struct sdio_func_tuple	*tuples;	/* unknown common tuples */