HV: set sos root dev of apl-up2 to mmcblk0p3
Set sos root device of apl-up2 to mmcblk0p3 and let UP2 uefi variant
and sbl variant share one config for now.
#define MISC_CFG_H
#define ROOTFS_0 "root=/dev/sda3 "
-#define ROOTFS_1 "root=/dev/mmcblk0p1 "
+#define ROOTFS_1 "root=/dev/mmcblk0p3 "
#define SOS_ROOTFS ROOTFS_1
#define SOS_CONSOLE "console=ttyS0 "
