unified MX27, MX25, MX37 trees
- [DH] packages/hal/arm/mx21/ads/v2_0/cdl/hal_arm_board.cdl
- [DH] packages/hal/arm/mx21/ads/v2_0/include/pkgconf/mlt_arm_board_romram.ldi
- [DH] packages/hal/arm/mx21/ads/v2_0/misc/redboot_ROMRAM.ecm
- [DH] packages/hal/arm/mx21/ads/v2_0/src/redboot_cmds.c