mtd: msm_qpic_nand: Enable Pagescope read feature on sdxlemur

Enable Pagescope read feature on sdxlemur also remove the
software workaround that made for pagescope read feature
on qpic 2.0 controllers because this got fixed on sdxlemur.

Change-Id: I61a2e16d308f80096628024030148a2d6e822ea8
Signed-off-by: Pradeep P V K <pragalla@codeaurora.org>