drivers: phy: phy-samsung-usb2.c: Add missing MODULE_DEVICE_TABLE

Allow phy-exynos-usb2 to be autoloaded based on devicetree information.
Tested on Odroid X2 with its USB subsystem build as modules.

Signed-off-by: Sjoerd Simons <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/phy/phy-samsung-usb2.c

···
 #endif
 	{ },
 };
+MODULE_DEVICE_TABLE(of, samsung_usb2_phy_of_match);
 
 static int samsung_usb2_phy_probe(struct platform_device *pdev)
 {