oppo-common: TARGET_POWERHAL_VARIANT = qcom

Change-Id: I9d2929b1d5c3aae13d3b71a73c1099c7dd8dbbb2
oppo-common: Add dependency on qcom/common for power HAL

Change-Id: I3fa42ae8aa0045f2f2a18b1efcb1ba10ff8403dc