s5p sdhci: call pinmux for card's gpio pins before use them

s5p sdhci: call pinmux for card's gpio pins before use them

The SD card detection depends on checking one pin state.
But the pin was configured after card was detected, which is wrong.

This commit fixes this, by moving call to pinmux before use the pin.

Tested-on: Odroid U3 and Odroid X2.

Signed-off-by: Przemyslaw Marczak <[email protected]>
Cc: Guillaume GARDET <[email protected]>
Cc: Lukasz Majewski <[email protected]>
Cc: Jaehoon Chung <[email protected]>
Cc: Minkyu Kang <[email protected]>
Cc: Simon Glass <[email protected]>
Acked-by: Jaehoon Chung <[email protected]>
Tested-by: Lukasz Majewski <[email protected]>
Signed-off-by: Minkyu Kang <[email protected]>