powerpc/85xx: Add support usb2/etsec and tdm/audio pin multiplex on P1022DS
For soc which have pin multiplex relation, some of them can't enable simultaneously. This patch add environment var 'hwconfig' content defination for them. you can enable some one function by setting environment var 'hwconfig' content and reset board. Detail setting please refer doc/README.p1022ds Signed-off-by: NJiang Yutang <b14898@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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doc/README.p1022ds
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