powerpc/85xx: Read board switch settings on p1_p2_rdb
PCA9557 is parallel I/O expansion device on I2C bus which stores various board switch settings like NOR Flash-Bank selection, SD Data width. On board: switch SW5[6] is to select width for eSDHC ON - 4-bit [Enable eSPI] OFF - 8-bit [Disable eSPI] switch SW4[8] is to select NOR Flash Bank for Booting OFF - Primary Bank ON - Secondary Bank Read board switch settings on p1_p2_rdb and configure corresponding eSDHC width. Signed-off-by: NPriyanka Jain <Priyanka.Jain@freescale.com> Signed-off-by: NDipen Dudhat <dipen.dudhat@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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