* support agilex platform in opensbi

* add support for agilex board in u-boot

* use jtag uart driver in u-boot

* remove unused drivers

* update submodules

* update uboot

* patch linux kernel when agilex platform is target

* use kernel patch for agilex only when building for it

* update uboot with 64 bits support for agilex

* remove patch of buildroot for agilex only when clean-all and only if platform is cva6-altera

* Delete linux_patch/0008-adapt-uart-agilex7.patch

* Add support to generate sd card for altera

* remove duplicated patch

* update submodules

* keep opensbi at riscv repo

* keep opensbi at same point as openhw

* update uboot to include mmc support

* cleanup

* fix submodules

* remove ltp

* fix clean-all in makefile

* do not fix size of last partition, use available space in sd card

* skip patches when already applied