ARM: dts: msm: Correct SMMU and ION device tree errors on Kona

Correct SMMU and ION device tree errors introduced as a part
of

'commit 5a1428b7 ("ARM: dts: msm: Fixes warnings
in kona device tree")'

Correct SMMU device tree to use the "status-reg" compatible
string instead of "status" and correct the heap id
corresponding to the system heap on the ION device tree on Kona.

Change-Id: I606514525154d5fa7d5839cc7a71a49b453d0adf
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>