[U-Boot] pxa310 SDHC support.

Hi, marek I've seen on the Internet that pxa310 support SDHC up to 32GB, but I'm using u-boot 2014.01, It could initialize OK.

Device: PXA MMC Manufacturer ID: 3 OEM: 5344 Name: SS08G Tran Speed: 26000000 Rd Block Len: 512 SD version 3.0 High Capacity: Yes Capacity: 7.4 GiB Bus Width: 4-bit

It shows time out while reading block . Is there any particular process should be add? Thank you very much.