i2c: Fix kerneldoc for renamed i2c dma put function

This function was renamed in commit 82fe39a6 ("i2c: refactor
function to release a DMA safe buffer") but this kernel doc wasn't
updated to point at the new function. Rename it.

Fixes: 82fe39a6

 ("i2c: refactor function to release a DMA safe buffer")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>