uboot-imx

Partially revert "efi_loader: Rename sections to allow for implicit data"

This partially reverts commit 7e21fbca26d18327cf7cabaad08df276a06a07d8.

That change broke sandbox EFI support for unknown reasons. It also changes
sandbox to use--gc-sections which we don't want.

For now I am just reverting the sandbox portion as presumably this change
is safe on other architectures.

Fixes: 7e21fbca26 (efi_loader: Rename sections to allow for implicit data)
Signed-off-by: Simon Glass <sjg@chromium.org>