ARM: dts: msm: Remove TURBO_L1 power level for SM8150

The highest power level, TURBO_L1, might be unstable.
To be safe, remove it from SM8150 for now.

Change-Id: I00f1028e5482ab8f853ed9b24a36b64ee4d4dd77
Signed-off-by: Kyle Piefer <kpiefer@codeaurora.org>