mmc: quirks: Fixup debug message

There is no need for an output like this:
> mmcblk mmc1:0001: calling add_quirk_mmc+0x0/0x20
Instead use this one:
> mmcblk mmc1:0001: calling add_quirk_mmc

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>