ARM: dts: msm: Disable smb138x charger for sa415m

Disable the smb138x charger device node for sa415m cdp devices
as we don't see any use case for sa415m auto targets and enable
vbus detection through through PMIC.

Change-Id: Ice5330b4ab13cac37a33fd2f88a1fb1e46f6cc51
Signed-off-by: Pavankumar Vijapur <pvijapur@codeaurora.org>