ION: Added support for getting ion phys without client

In order to dereference the ion_handles passed from user side
to kernel, there should be support for api without client identity.
This patch adds this support.

Change-Id: I95d0d460c9e0ad202d14e7620b82e1fa9d48f746
Signed-off-by: Sunita Nadampalli <sunitan@ti.com>
Signed-off-by: Lajos Molnar <lajos@ti.com>
Signed-off-by: Dima Svetlov <svetlov@ti.com>
Add/fix several mismerge bits. Still needs work...

... though it got up to linking.

Change-Id: I4932eea5196a16ec177fc80e1d649b197d40cc61