spi/dw: Add spi number into spi irq desc

Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 7a5e78d..8b7b07b 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -96,6 +96,7 @@
 	struct spi_device	*cur_dev;
 	struct device		*parent_dev;
 	enum dw_ssi_type	type;
+	char			name[16];
 
 	void __iomem		*regs;
 	unsigned long		paddr;