amd/amdht: Fix format security errors

Ubuntu’s default compiler flags for GCC [1][2] include `-Wformat
-Wformat-security`, causing errors similar like the one below.

```
    CC         romstage/northbridge/amd/amdht/ht_wrapper.o
src/northbridge/amd/amdht/ht_wrapper.c: In function 'AMD_CB_EventNotify':
src/northbridge/amd/amdht/ht_wrapper.c:124:4: error: format not a string literal and no format arguments [-Werror=format-security]
    printk(log_level, event_class_string_decodes[evtClass]);
    ^
[…]
```

Fix that, by explicitly using a format string.

TEST=Built and booted on ASUS KGPE-D16.

[1] https://stackoverflow.com/questions/17260409/fprintf-error-format-not-a-string-literal-and-no-format-arguments-werror-for
    "fprintf, error: format not a string literal and no format arguments [-Werror=format-security"
[2] I tested with gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609.

Change-Id: Iabe60deeffa441146eab31dac4416846ce95c32a
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/18208
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>

0 files changed, 0 insertions, 0 deletions