soc: MIMXRT11xx: Enable FlexSPI on MIMXRT11xx

Enable flexspi for RT11xx SOCs. This requires selecting the correct
KConfig symbol for the cortex m4 and m7 SOCs, as well as correcting an
error in the flexspi DTS node and updating the clock init for RT11xx
SOCs.

Note that in addition, the NXP hal must be updated to properly support
including the cache management driver for the Cortex M4.

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