Support for booting from eMMC

Fusee will Look for FAT32 partition on BOOT1 (1MB offset), BOOT1, GPP, SD, in this order
If a .no_boot_storage file is found in the root directory, the partition is skipped

fusee/program/source/fatfs/ffconf.h

@@ -150,7 +150,7 @@
 */
 
 
-#define FF_FS_RPATH     0
+#define FF_FS_RPATH     1
 /* This option configures support for relative path.
 /
 /   0: Disable relative path and remove related functions.
@@ -163,12 +163,12 @@
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
 
-#define FF_VOLUMES      2
+#define FF_VOLUMES      4
 /* Number of volumes (logical drives) to be used. (1-10) */
 
 
 #define FF_STR_VOLUME_ID    1
-#define FF_VOLUME_STRS      "sdmc","sys"
+#define FF_VOLUME_STRS      "sdmc","sys","boot1","boot1_off"
 /* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
 /  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
 /  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each