ARM: dts: msm: Update more thermal-mitigation levels for PM660

Add more granular thermal-mitigation levels for battery charging
limit based on thermal condition. It helps for steady control
of temperature when charging is enabled.

CRs-Fixed: 2017321
Change-Id: I082d478795b066e61970a7543118b55e7108b594
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>