[MMC] Move set_ios debugging into mmc.c

Rather than having every driver duplicate the set_ios debugging,
provide a single version in mmc.c which can be expanded as we
add additional functionality.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --cc drivers/mmc/at91_mci.c
Simple merge

diff --cc drivers/mmc/au1xmmc.c
Simple merge

diff --cc drivers/mmc/imxmmc.c
Simple merge

diff --cc drivers/mmc/mmc.c
Simple merge

diff --cc drivers/mmc/mmci.c
Simple merge

diff --cc drivers/mmc/pxamci.c
Simple merge

diff --cc drivers/mmc/sdhci.c
Simple merge

diff --cc drivers/mmc/wbsd.c
Simple merge