sdhci: make workaround for timeout bug more general

Give the quirk for broken timeout handling a better chance of handling
more controllers by simply classifying the system as broken and setting
a fixed value.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

diff --cc drivers/mmc/host/sdhci-pci.c
Simple merge

diff --cc drivers/mmc/host/sdhci.c
Simple merge

diff --cc drivers/mmc/host/sdhci.h
Simple merge