[PATCH 3/3] bcm63xx_enet: avoid uninitialized variable warning

[David Miller]

From: Arnd Bergmann <arnd at arndb.de>
Date: Wed, 18 Jan 2017 15:52:53 +0100

> gcc-7 and probably earlier versions get confused by this function
> and print a harmless warning:
> 
> drivers/net/ethernet/broadcom/bcm63xx_enet.c: In function 'bcm_enet_open':
> drivers/net/ethernet/broadcom/bcm63xx_enet.c:1130:3: error: 'phydev' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> This adds an initialization for the 'phydev' variable when it is unused
> and changes the check to test for that NULL pointer to make it clear
> that we always pass a valid pointer here.
> 
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

Also applied, thanks.