mainboards: Don’t select `POST_IO`

Currently, it’s impossible for the user to select `NO_POST`, for boards
selecting it in their config.

```
warning: (BOARD_SPECIFIC_OPTIONS && BOARD_SPECIFIC_OPTIONS &&
BOARD_SPECIFIC_OPTIONS) selects POST_IO which has unmet direct
dependencies (VENDOR_ASUS && (BOARD_ASUS_F2A85_M ||
BOARD_ASUS_F2A85_M_PRO || BOARD_ASUS_F2A85_M_LE) && (BOARD_ASUS_F2A85_M
|| BOARD_ASUS_F2A85_M_PRO) || VENDOR_MSI && BOARD_MSI_MS7721 ||
PC80_SYSTEM && !NO_POST)
```

This is currently done for Intel Mohon Peak, and its descendants.

Selecting the option `POST_IO` in board specific configuration is not a
good idea, as this should be user configurable over Kconfig, and also
the tree-wide defaults should be the same for these options.

Change-Id: Ia4ab0d942b7d66f18466a770ef739109ab0db629
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/18877
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions