Revert "msm: pm: Clean up idle-v7"

This reverts commit e8c9ac17c2bec9958116569519ef7f25675a8ea8.
Revert "msm: idle: Use ARM suspend/resume APIs to restore during warmboot"

This reverts commit 6ab6107e70d266ca53bf04ab61c81bf029f5e16a.
Revert "Revert "msm: idle-v7: flush non secure L1 cache lines for l2 GDHS LPM mode""

This reverts commit 057eaf3ed6fb760707c5428c9c78bfe52b9af9fb.
Revert "ARM: kernel: update cpu_suspend code to use cache LoUIS operations"

This reverts commit 97d19eeac5185319c4f595ae0a460ff456344f0a.
Revert "ARM: mm: implement LoUIS API for cache maintenance ops"

This reverts commit 48a54bf180719d4066808082a3a46ab1d6515e1b.