Some new platform's esdhc pins don't share with other function. The eSDHC shouldn't be disabled, even if "esdhc" isn't defined in hwconfig env variable. Use CONFIG_FSL_ESDHC_PIN_MUX to fix this problem. Signed-off-by: Chenhui Zhao <b26998@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>