[PATCH 0/2] add call backs in sdhci-pxa.c

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Hi, Chris

Could you help re-check these patches submitted before.

These two patches introduce several call backs in sdhci-pxa.c

patch 1: move sdhci_priv and sdhci_ops definition to
include/linux/mmc/sdhci.h from drivers/mmc/host/sdhci.h
1. platfrom could directly overwrite sdhci_ops with soc specific ops,
this case occurs at different controller share the same driver, while
different ops they may use, so move sdhci_ops definition to include
2. platform code will use sdhci_priv to access host->private

Patch 2: Introduce several call backs.
pxa955 may require external gpio to detect card insert and remove.
soc_set_ops is used to overwrite host ops directly from platfrom ops.
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