mci: imx-esdhc: Check for errors in esdhc_pio_read_write
esdhc_pio_read_write can fail, so let it return an error code
rather than void.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 320ae02 commit 284a1657e6ef1f2af43d34a01c503b7ac595c599
@Sascha Hauer Sascha Hauer authored on 13 May 2015
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drivers/mci/imx-esdhc.c