drivers: qti-virtual-sensor: Add hepta cpu max virtual sensor for SDM632

Update MAX mode virtual sensors list with hepta core sensors for
SDM632. It enables thermal zone devicetree rule to use this sensor
for cpu mitigation.

Change-Id: I28d37709441b7f51ab842532a6a50ca04c064d13
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>