build: qcom_target: Define MASTER_SIDE_CP_TARGET_LIST

Currently, in the display HAL, we're replacing the usage
of this variable with a check for TARGET_BOARD_PLATFORM.

Instead of having to do that every time a new branch is made,
define the variable in qcom_target.

Change-Id: Iddcc38c70adc52267e70c985b7a0ad3d8c4c8929
1 file changed