mkimage_imx8: apply "imx8m: Align the IVT header to 64bytes"

Source: https://source.codeaurora.org/external/imx/imx-mkimage/
Branch: imx_4.9.51_imx8m_ga

Patch applied:
https://source.codeaurora.org/external/imx/imx-mkimage/commit/?h=imx_4.9.123_imx8mm_ga&id=9e289f314eddb9d38cab73780b936acb30bb88b4

Build:
$ make -C iMX8M -f soc.mak

Change-Id: I1d504ea82d535c07ba19e316caab1e3e06668fd8
diff --git a/imx8m/mkimage_imx8 b/imx8m/mkimage_imx8
index 57041b9..809c9ac 100755
--- a/imx8m/mkimage_imx8
+++ b/imx8m/mkimage_imx8
Binary files differ