ARM: dts: msm: add PM8004 PON as a secondary PON device

As per the recommendation from the hardware team, during system
reset, secondary PMIC's PON should be configured in the same way
as that of the primary PMIC PM8994. Hence add the PON device for
PM8004 and configure it as a secondary PON device.

Change-Id: I1778db19b3b8faf775ddce7d046dad8e210ef075
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>