ARM: dts: msm: Fix whitespace in implementation defined settings

Somehow a line starting with a non-tab whitespace snuck through.  To
avoid checkpatch issues on future patches touching this line, convert
the spaces to a tab.

Change-Id: I161f15c9ab8770442260b6a977a23902905f8fce
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>