PXA: PXAMMC: Drop different delays for PXA27X

In case the delays were set to 10000, the MMC card on PXA27X boards (and PXA3xx
boards) didn't initialize on first try. Increasing the delays and leaving just
those for PXA25x and 26x (that is 200000) fixes this problem.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>