musb: Use name based initialization for musb_config

Changed musb_config initialization for omap3.c, davinci.c
and da8xx.c using name of structure fields. This would cause
the uninitialized field to be null by default and thus would
help in avoiding to init some flags required to be set only
for a few selected platforms.

CC: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
diff --git a/drivers/usb/musb/omap3.c b/drivers/usb/musb/omap3.c
index 3bfd0a0..785629c 100644
--- a/drivers/usb/musb/omap3.c
+++ b/drivers/usb/musb/omap3.c
@@ -36,9 +36,9 @@
 static int platform_needs_initialization = 1;
 
 struct musb_config musb_cfg = {
-	(struct	musb_regs *)MENTOR_USB0_BASE,
-	OMAP3_USB_TIMEOUT,
-	0
+	.regs		= (struct musb_regs *)MENTOR_USB0_BASE,
+	.timeout	= OMAP3_USB_TIMEOUT,
+	.musb_speed	= 0,
 };
 
 /*