modules: nxp_imx: Add HAS_MCUX_FLEXSPI to mimxrt1024
modules: nxp_imx: Add HAS_MCUX_FLEXSPI to mimxrt1024

the config symbol was missing for some reason even though
the soc does have a flexspi peripheral like most other socs
in the family.

Signed-off-by: Mikkel Jakobsen <31215e1a25e10d3f738438d78f8193ee267dd757@prevas.dk>

finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr