Add dynamic parent and shaper update callbacks that
can be used to change RR Quantum or PIR/CIR rate dynamically
post hierarchy commit. Dynamic parent update callback only
supports updating RR quantum of a given child with respect to
its parent. There is no support yet to change priority or parent
itself.
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com> Signed-off-by: Krzysztof Kanas <kkanas@marvell.com>