dma_mcux_edma: Abort transfer before clear status

The transfer must be aborted before clearing the status flags otherwise
they will be set again before the transfer is aborted and stay set
causing infinite interrupt.

Also, elevate the log message to error level and give it actual useful
information. The "flag" being logged before literally just is a bit that
says if there is an error or not, which we already know by virtue of
handling an error. The channel error status has actual details about
what was the reason of the error. Also this status should be reported
before the transfer is aborted to get the right status.

Signed-off-by: Declan Snyder <declan.snyder@nxp.com>