usb: musb: jz4740: Suppress useless field in priv structure

The 'dev' field was never read anywhere.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-12-b-liu@ti.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/jz4740.c

@@ -17,7 +17,6 @@
 #include "musb_core.h"
 
 struct jz4740_glue {
-	struct device           *dev;
 	struct platform_device  *musb;
 	struct clk		*clk;
 };
@@ -141,7 +140,6 @@ static int jz4740_probe(struct platform_device *pdev)
 
 	musb->dev.parent		= &pdev->dev;
 
-	glue->dev			= &pdev->dev;
 	glue->musb			= musb;
 	glue->clk			= clk;