msm: qrd7627a: Add device info for NCP6335D external regulator

MSM8625q supports an external SMPS buck (NCP6335D) to control
the APPS core voltage. This regulator is controlled via the I2C
interface.

Change-Id: I60b60625aa365c3ee9530e17c474a3795b1ddcd2
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>