This commit is responsible for compile error:
"
commit 3e1e4a5f3a324502c27c4e8808e06ac2ea842360
Author: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Thu Dec 12 17:12:31 2013 -0800
mfd/rtc: s5m: fix register updating by adding regmap for RTC
Rename old regmap field of "struct sec_pmic_dev" to "regmap_pmic" and
add new regmap for RTC.
...
"
Problem is that old field name is regmap and now is regmap_pmic, so drivers
that use it don't compile. I compile regularly so one needs to change
regmap to regmap_pmic in two file where compiler complains.
I guess that nobody compiles that driver, so kernel devels
didn;t catch this error yet