msm: board-8064: Wrap PMIC 8921 GPIO 23 in a gpio-regulator device

Wrap PMIC 8921 GPIO 23 in a gpio-regulator device so that the
Atmel MXT touchscreen driver can be simplified. GPIO 23 represents
the TS_PWR_EN_PMIC signal on 8064 devices. This drives a FET which
switches the 3.3V regulator output for touchscreen use.

Change-Id: I1f4fd02506640eda16bed4d25c03ad410ffb9287
Signed-off-by: David Collins <collinsd@codeaurora.org>
4 files changed