drivers: usb: core: hcd: if-else-braces fixed

Put else keyword on same line as closing brace from if statement, added
{ } braces as the styleguide says.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>