Merge tag 'efi-next-2026-02-15' of https://source.denx.de/u-boot/custodians/u-boot...

Pull request efi-next-2026-02-15

CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/jobs/1380382

UEFI:

* Add MBR support to EFI_PARTITION_INFO_PROTOCOL
  * disk: part_dos: Move header to the main include directory
  * disk: part_dos: Align dos_partition_t with struct partition
  * disk: part_efi: Remove redundant struct partition definition
  * disk: part_dos: Document part_get_info_extended() helper function
  * disk: part_dos: Refactor to allow retrieving raw MBR partition data
  * efi_loader: disk: Extend EFI_PARTITION_INFO_PROTOCOL to support MBR
  * efi_selftest: Enhance MBR test for PARTITION_INFO_PROTOCOL

* Prepare for supporting more stores (e.g. SPI-flash) for EFI variables.
  * efi_var: Unify read/write access helper function
  * efi_loader: Setup default location for UEFI Variables storing
  * efi_var_file: refactor to move buffer functions