powerpc/t4240rdb: enable eSDHC 3.3V support

The SD supply Voltage was 3.3V on T4240RDB, so enabled 3.3V support for eSDHC.

Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Signed-off-by: Wujie Qiu <B49553@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
1 file changed