mmc: sdhci-pci-o2micro: Fix spelling mistake "unsupport" -> "unsupported"

There is a spelling mistake in a pr_info message. Fix it. Also
put msi in capital letters.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20210924225111.143112-1-colin.king@canonical.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>