boards: nxp: mimxrt1050: enable PXP and apply optimized LVGL settings

Enable PXP on RT1050 EVK, and apply LVGL settings optimized for PXP
support. These settings will enable PXP rotation to function as expected
when using LVGL with the RT1050.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>