usb: gadget: SourceSink: Fix show methods for attributes
usb: gadget: SourceSink: Fix show methods for attributes

Most of USB functions place new line after attribute value.
Let's follow this convention also in source sink function
as it improves readability.

Signed-off-by: Krzysztof Opasiak <8064eda6f94b3817252b7d7649cf754592f63500@samsung.com>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs