mmc: core: Initialize temperature controlled clock scaling

Register and deregister for temperature controlled clk scaling
when card is attached and dettached from the device.
This will allow to control the clock frequency based on temperature.

Change-Id: Ie01d573406c273847fb31a5dd64e2b39671e4ac0
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>