usb: host: {e|o}hci-dbg: kill useless 'ret' variable initializers

The 'ret' local variables are often initialized to 0 but this value is
unused, thus we can kill those initializers...

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/901b7478-45b6-d8b3-f5c6-555712485232@omp.ru


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>