Port I2C driver from current driver to k30

Port I2C driver from current driver to k30

BZ: 15206

1. some differences of runtime PM implementation, including
auto runtime suspend.
2. one bug fixing in ISR.
3. add dump function for debugging.
4. correct clock setting.

Change-Id: Ib3d82e91333aa33bd319d5fed88389b15bd698fc
Signed-off-by: Bin Yang <bin.yang@intel.com>
Reviewed-on: http://android.intel.com:8080/25164
Reviewed-by: buildbot <buildbot@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Tested-by: Gross, Mark <mark.gross@intel.com>