Add support for writing data to EEPROM. Change-Id: Id6b5096f2d59d21773c06ba3803151c2f3248956 Signed-off-by: Ben Dooks <ben@simtec.co.uk> Cc: Wolfram Sang <w.sang@pengutronix.de> Cc: Jean Delvare <khali@linux-fr.org> Cc: Linux Kernel <linux-kernel@vger.kernel.org> [sboyd@codeaurora.org: use usleep_range() instead of msleep()] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>