UBUNTU: Disable CONFIG_UEVENT_HELPER_PATH

We don't use /sbin/hotplug anymore. Should save a few cycles since it is tested
for in lib/kobject_uevent.c:233

Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>
Signed-off-by: Scott James Remnant <scott@canonical.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>