mtd: msm_qpic_nand: Add new register changes for QPIC 2.0

A new register "NAND_READ_LOCATION_LAST_CW_n" got added from
QPIC 2.0 controller version. This register is used to extract
data portions for last codeword. For all codewords except last
codeword NAND_READ_LOCATION_n registers are used.
Hence it is required to use this new register for all read page
operations.

Change-Id: I1f0d2e059e725ecbb4d1ce01f5591032564ee1f2
Signed-off-by: Pradeep P V K <ppvk@codeaurora.org>