k64: Change the default gpio driver to the mcux one

Stop using the specific k64 gpio driver by default and start using the
more generic mcux gpio driver instead.

Jira: ZEP-1394
Change-Id: I54ec9b62cc8790b8973efc34fa36d17da523971e
Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
1 file changed