board/freescale/imx8mqevk: fix typos in readme

Signed-off-by: André Hentschel <nerv@dawncrow.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 92daeae9603043b7cd7af25bb53a9b3ef2ce6eff)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/freescale/imx8mqevk/readme.txt

@@ -21,7 +21,7 @@ You will find in output/images/ the following files:
   - boot.vfat
   - fsl-imx8mq-evk.dtb
   - Image
-  - imx-boot-imx8mqevk-sd.bin
+  - imx8-boot-sd.bin
   - lpddr4_pmu_train_fw.bin
   - rootfs.ext2
   - rootfs.ext4
@@ -69,7 +69,7 @@ Enable HDMI output
 
 To enable HDMI output at boot you must provide the video kernel boot
 argument.  To set the video boot argument from U-Boot run after
-stoping in U-Boot prompt:
+stopping in U-Boot prompt:
 
 setenv mmcargs 'setenv bootargs console=${console} root=${mmcroot} video=HDMI-A-1:1920x1080-32@60'
 saveenv