ARM: dts: msm: Add qpnp rtc device for PM6125

The patch adds qpnp rtc device to support qpnp rtc
driver for trinket. The rtc driver supports using the
PMIC RTC peripheral to wake a device up from suspend
or to wake it up from power-off.

Change-Id: I122de10c6967815b74d4928109d3e1eebfbbdd71
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>