In the rev.4 11/2016 version of the data sheet for the Solo Lite, NVCC_1P2V is listed on Table 9 with a maximum voltage of 1.3V. It is listed in section 4.5 as used for the internal oscillator supply. It is also listed in Table 66 as being included in the DDR power group. There is also this comment in Table 70: "– Removed from the GPIO supplies row; NVCC_1P2V row for DDR3L"
For a design using the i.MX6SL with DDR3L, is it recommended to connect NVCC_1P2V to the 1.35V supply for the DDR3?