ARM: dts: msm: Update default l2 mode to be l2 active

l2 spm should be disabled once we are out of power collapse on 8226
and 8610. As there maybe a race set the l2 mode to retention vs active
when we exit from power collapse, change the default l2 mode to be active.

Change-Id: I616afe865abe0de3c0a088e5e083b3411adedce2
Signed-off-by: Priyanka Mathur <pmathur@codeaurora.org>