[PATCH v2 6/6] doc: sl-mx8mm: Add CROSS_COMPILE to U-Boot make call and improve comment

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf at kontron.de>

Add the CROSS_COMPILE flag as we assume we build in a cross environment.
Also improve the comment about copying the binary to SD card.

Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
---
 doc/board/kontron/sl-mx8mm.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/board/kontron/sl-mx8mm.rst b/doc/board/kontron/sl-mx8mm.rst
index a8a3d5fc24..b7346d8cfb 100644
--- a/doc/board/kontron/sl-mx8mm.rst
+++ b/doc/board/kontron/sl-mx8mm.rst
@@ -79,9 +79,9 @@ Build U-Boot
 .. code-block:: bash
 
    $ make kontron-sl-mx8mm_defconfig
-   $ make
+   $ make CROSS_COMPILE=aarch64-linux-gnu-
 
-Burn the flash.bin to SD card at an offset of 33 KiB:
+Copy the flash.bin to SD card at an offset of 33 KiB:
 
 .. code-block:: bash
 
-- 
2.39.0