i2c: tegra: add standardized clk/reset API support

i2c: tegra: add standardized clk/reset API support

clk/reset API was tested on T186 platform and previous chip like
T210/T124 will still use the old APIs.

Signed-off-by: Bryan Wu <[email protected]>
(swarren, simplified some ifdefs, removed indent level inside an ifdef)
(swarren, added comment about the ifdefs)
Signed-off-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Heiko Schocher <[email protected]>
Signed-off-by: Tom Warren <[email protected]>