lwmon, tqm8xx: Fix build errors

Commit 6b59e03e
lcd: Let the board code show board-specific info

introduced some bugs which prevent U-Boot building
for lwmon board if CONFIG_LCD_INFO_BELOW_LOGO will
be defined in the board configuration.

Also "LCD enabled" building for TQM823L doesn't work
since this commit.

This patch fixes above-mentioned issues.

Signed-off-by: Anatolij Gustschin <agust@denx.de>