Powerpc: eSDHC: expand a fix to T4160

commit b8e5b072 "Powerpc: eSDHC: Fix mmc read write err in uboot of
T4240QDS board", T4160 also needs this fix.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>