AGESA CIMX: Remove empty set_pcie_(de)reset

For boards with cimx/sb800, mainboards defined only empty
stubs. Reset functionality is handled as BiosCallout.

For amd/inagua, the defined function was actually initial
GPIO programming.

For cimx/sb700, function had prototypes but no callers.
For cimx/sb900, everything was commented out already.

Change-Id: I936feb4fc41d903078620c919a733bb9f39c3efb
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21477
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/lippert/frontrunner-af/mainboard.c

@@ -111,26 +111,6 @@ static void init(struct device *dev)
 	printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " EXIT %s\n", __func__);
 }
 
-void set_pcie_reset(void);
-void set_pcie_dereset(void);
-
-/**
- * TODO
- * SB CIMx callback
- */
-void set_pcie_reset(void)
-{
-}
-
-/**
- * TODO
- * mainboard specific SB CIMx callback
- */
-void set_pcie_dereset(void)
-{
-}
-
-
 /**********************************************
  * Enable the dedicated functions of the board.
  **********************************************/