pitx-imx8m: update README

board/kontron/pitx-imx8m/README

@@ -14,22 +14,22 @@ Quick Start
 Build ARM Trusted Firmware
 ==========================
 - Get ATF from https://source.codeaurora.org/external/imx/imx-atf
-- Checkout imx_4.19.35_1.1.0 branch
+- Checkout imx_5.4.24_2.1.0 branch
 $ make PLAT=imx8mq bl31
 - Copy the ATF blob into u-boot build_dir
 $ cp build/imx8mq/release/bl31.bin <build_dir>
 
 Get DDR and HDMI Firmware
 =========================
-$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-7.8.bin
-$ chmod +x firmware-imx-7.8.bin
+$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.8.bin
+$ chmod +x firmware-imx-8.8.bin
 
 - Note: You must accept NXP EULA when extracting the image in the next step.
-$ ./firmware-imx-7.8.bin
+$ ./firmware-imx-8.8.bin
 
 - Copy firmware blobs to u-boot build_dir
-$ cp firmware-imx-7.8/firmware/hdmi/cadence/signed_hdmi_imx8m.bin <build_dir>
-$ cp firmware-imx-7.8/firmware/ddr/synopsys/lpddr4*.bin <build_dir>
+$ cp firmware-imx-8.8/firmware/hdmi/cadence/signed_hdmi_imx8m.bin <build_dir>
+$ cp firmware-imx-8.8/firmware/ddr/synopsys/lpddr4*.bin <build_dir>
 
 Build U-Boot and final boot image
 =================================