mmc: fsl_esdhc_imx: replace most #ifdefs by IS_ENABLED()

[ fsl_esdhc commit 52faec31827ec1a1837977e29c067424426634c5 ]

Make the code cleaner and drop the old-style #ifdef constructs where it is
possible.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
2 files changed