[4-0] serial patches that enable the eSDHC on iMX51

[Richard Zhu]

Hi All:
Sorry, for wrong --compose usage.

Hi Wolfram:
Here are the patches that enable the sdhci of i.MX51.
The IO and WP funcs are verified on i.MX51 BBG board.
The misssing bits of the HOST_CONTROL and so on had been made up in the 4-3 patch.


Hi Uwe:
I would change MSL part to the "dynamically allocated method" later.

Any review/comments/suggestions are appreciated.
Thanks in advanced.