Michael Mogenson f5e431483e imxrt: fix userled config in appinit
The imxrt1064, imxrt1064, and teensy-4.x board configs would fail to
build when CONFIG_USERLED_LOWER was enabled, due to a missing header in
imxrt_appinit.c and an unset local define.

Verified a build succeds for the specified boards with the following
defconfig modifications:

    # CONFIG_ARCH_LEDS is not set
    CONFIG_USERLED=y
    CONFIG_USERLED_LOWER=y

Tested the "leds" Led driver example on a Teensy 4.1.
2022-03-03 02:06:12 +08:00
..
2022-03-03 02:06:12 +08:00