mmc: vub300: fix control-message timeouts

USB control-message timeouts are specified in milliseconds and should
specifically not vary with CONFIG_HZ.

Fixes: 88095e7b ("mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver")
Cc: stable@vger.kernel.org      # 3.0
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20211025115608.5287-1-johan@kernel.org


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