Revert "configs/qemu_arm_versatile_defconfig: increase SD card image size to 64MiB"
qemu_arm_versatile doesn't use SD card interface but SCSI, so there is no
need to increase the image size.
The change was for qemu_arm_vexpress_defconfig instead (notice the
name of the defconfig used in gitlab).
This reverts commit cb62a8e0a2b88b6c1b3ffe74e9eb370bf686fa62.
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>