HID: hidpp: terminate retry loop on success

It seems we forgot the normal case to terminate the retry loop,
making us asking 3 times each command, which is probably a little bit
too much.

And remove the ugly "goto exit" that can be replaced by a simpler "break"

Fixes: 586e8fed

 ("HID: logitech-hidpp: Retry commands when device is busy")
Suggested-by: Mark Lord <mlord@pobox.com>
Tested-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>