[ARM]tegra:i2c: Adding i2c slave support apis.

To support the i2c slave functionality in the kernel, adding the
framework so that chip specific slave driver can be plugged in.

Adding slave adapter and alogithms in framework so that slave bus driver
can register chip specific driver.

Original-Change-Id: Ie002dbd3b021f70814b455471e66a5da378ab3e9
Reviewed-on: http://git-master/r/14206
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Alok Chauhan <alokc@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Original-Change-Id: I92b6bc4f3953a9edc7f9414a65b69005d2bbf8db

Rebase-Id: R13abe740fa88a76747dcbcd42ffc9f74a504f7c5
5 files changed