Revert "Revert "msm: mdss: refactor pipe list management""

This reverts commit 38a91163f5f56613e1b980441c8fe17e74218d01.

Change-Id: I28c2767aadcbcbf89ac78206d467d35aa329e0fe
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>
msm: mdss: fix multiple overlay release sequence

Overlay release allows multiple releases to happen by having
multiple bits set in overlay unset call. Fix logic to find
all pipes which match the bitmap.

Change-Id: I6a25a81fe4c437b5546537d48e250055357682f0
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>