firmware: Include IMX8M u-boot firmware binaries

This imports a number of memory training files, HDMI firmware, and other
bits that u-boot requires to start the system for the imx8m enterprise
board.
diff --git a/imx8m/bl31.bin b/imx8m/bl31.bin
new file mode 100755
index 0000000..2d5f117
--- /dev/null
+++ b/imx8m/bl31.bin
Binary files differ
diff --git a/imx8m/lpddr4_pmu_train_1d_dmem.bin b/imx8m/lpddr4_pmu_train_1d_dmem.bin
new file mode 100644
index 0000000..2ac8327
--- /dev/null
+++ b/imx8m/lpddr4_pmu_train_1d_dmem.bin
Binary files differ
diff --git a/imx8m/lpddr4_pmu_train_1d_imem.bin b/imx8m/lpddr4_pmu_train_1d_imem.bin
new file mode 100644
index 0000000..e1a27bf
--- /dev/null
+++ b/imx8m/lpddr4_pmu_train_1d_imem.bin
Binary files differ
diff --git a/imx8m/lpddr4_pmu_train_2d_dmem.bin b/imx8m/lpddr4_pmu_train_2d_dmem.bin
new file mode 100644
index 0000000..dd87ee5
--- /dev/null
+++ b/imx8m/lpddr4_pmu_train_2d_dmem.bin
Binary files differ
diff --git a/imx8m/lpddr4_pmu_train_2d_imem.bin b/imx8m/lpddr4_pmu_train_2d_imem.bin
new file mode 100644
index 0000000..927c1b9
--- /dev/null
+++ b/imx8m/lpddr4_pmu_train_2d_imem.bin
Binary files differ
diff --git a/imx8m/mkimage_imx8 b/imx8m/mkimage_imx8
new file mode 100755
index 0000000..57041b9
--- /dev/null
+++ b/imx8m/mkimage_imx8
Binary files differ
diff --git a/imx8m/signed_hdmi_imx8m.bin b/imx8m/signed_hdmi_imx8m.bin
new file mode 100644
index 0000000..472df6c
--- /dev/null
+++ b/imx8m/signed_hdmi_imx8m.bin
Binary files differ
diff --git a/imx8m/u-boot.imx b/imx8m/u-boot.imx
new file mode 100644
index 0000000..b941adc
--- /dev/null
+++ b/imx8m/u-boot.imx
Binary files differ