common/lcd.c: cleanup use of global variables

console_col, console_row, lcd_line_length, lcd_console_address had
to be declared in board / driver specific code, but were not actually
used there. Get rid of the global variables.
common/lcd.c: remove global lcd_base
common/lcd: clean up a bit

This patch
 - Make the brackets of the function call a bit more consistent
 - Remove really unnessary brackets.
 - Removes the extern from the function definitions
 - Remove curtly brackets from single line statements
 - Remove lcd_setmem proto since it is already in common.h
 - Don't init globals to 0
mcc200, ...., : remove proto already in lcd.h and unused code
api/api_diplay: use the getters for console size info
common/lcd.c: move the macro's to the c file
powerpc has aliasing problems at the moment..