i2c: sh_mobile: document support for r8a77990 (R-Car E3)

Document support for the IIC code for the r8a77990 (R-Car E3).

It is not considered compatible with existing fallback bindings
due to the documented absence of automatic transmission registers.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Simon Horman 2018-11-21 13:09:27 +01:00 • committed by Wolfram Sang
commit fca34b910d