Revert "Update BOARD_USES_PMEM_ADSP flag to BOARD_USES_PMEM_CAMERA"

This reverts commit 8e38b15ce25c5d3819a919effb683697bc0bd89c.
BoardConfigCommon: Remove TARGET_DISPLAY_INSECURE_MM_HEAP

This is for the CAF display HAL.
bcmdhd: Don't use modular bcmdhd