ARM: dts: msm: Update corner mapping for Power@1.2 GHz for 8939 v3.0

On 8939 v3.0 the CPR quotients are fused considering VMIN for both power
and performance cluster. Hence, no additional voltage boost is required
for Power@1.2 GHz.

CRs-Fixed: 812366
Change-Id: I2a4aa0d7eb8a1f927fb994bf89ab25337359055c
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>
Signed-off-by: Sridhar Gujje <sgujje@codeaurora.org>
Signed-off-by: Bharat Pawar <bpawar@codeaurora.org>
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>