Fix compile while compiling drivers/mmc/host/mmc_spi.o with !BLOCK

Make sure the mmc_spi driver can build without CONFIG_BLOCK.
Issue noted by "Avuton Olrich" <avuton@gmail.com> and randconfig.

While that won't be a common configuration, sometimes embedded
boards use SDIO to interface WLAN or Bluetooth chips (vs some
parallel interface), and don't provide an MMC/SD socket for use
with flash memory cards.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mmc/host/mmc_spi.c

@@ -26,7 +26,7 @@
  */
 #include <linux/hrtimer.h>
 #include <linux/delay.h>
-#include <linux/blkdev.h>
+#include <linux/bio.h>
 #include <linux/dma-mapping.h>
 #include <linux/crc7.h>
 #include <linux/crc-itu-t.h>