Add multiplexing support among SPI flash, TDM riser card and SDXC.
it routes SPI pins to SPI flash by default.
Route SPI pins to SD slot if "adaptor=sdxc" is set in hwconfig.
Route SPI pins to TDM riser card and do fixup for dts if "pin_mux=tdm"
is set in hwconfig.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Signed-off-by: Zhao Qiang <B45475@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
projects / u-boot / commit