ARM: dts: msm: use the correct trip phandle for gpu cooling maps of sdm670

Use the correct trip phandle for gpu cooling device maps of each
low floor mitigation zone for sdm670.

Change-Id: If622361918183fff2db7abac0b40e5e6eedba890
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>