FIRSBOOT: add extra p5 for ROMS (use GPT) & add option for switching FS (#168)

* BOARD: firstboot:  use ext4 for p1 explicitly
* BOARD: /etc/main : update fsck scripts
* BOARD: inittab: 
 - add /roms in p5
 - mount RO /boot in async (default)
* BOARD: genimage.sh: gen ROMS EXT4 image
* BAORD: prebuild.sh: 
 - create mount point for ROMS
 - increase MAIN & ROMS block size
 - the size of /mnt is "hardcoded" after image creation
 - we need real space for backup manipulation in ROMS
* BOARD: mv roms upward
* BOARD: firstboot: add p5 ROMS and resize
* BOARD: genimage-sdcard.cfg: 
 - use GPT
 - add p5 for roms

* PACKAGE/BOARD: patch/genimage: down-size gpt table
* PACKAGE/DEFCONFIG: add `gptfdisk` package to shared
* BOARD: firstboot: allow for switching FS type in MAIN and ROMS
* README: update firstboot_procedure.drawio.png
  - add FS change boxes and IPK installer
* BOARD: firstboot: not mandatory to resize for IPK manager
* DEFCONFIG: add default kernel patching
* DEFCONFIG: uppercase rootfs label
* BOARD: umtpr: uppercas partition LABELS
* DEFCONFIG/PACKAGE: add RSYNC pkg
* BOARD: mount FAT p5 in async (default)

* BOARD: add ROMS icons for Win
Co-Authored-By: TriForce <triforce@gznetwork.com>

board/miyoo/main/options.cfg

@@ -1,5 +1,5 @@
 MODULES_CUSTOM=0
-FAT_CHECK=1  
+FS_CHECK=1 
 BOOT_LOGO=1 
 FLIP= (put 0 or 1 to overwrite)
 INVERT= (put 0 or 1 to overwrite)