drivers/intel/fsp1.1: Simplify bootflow and clean up

This gets rid of the boilerplate back and forward calls between the
SOC/FSP-driver code and mainboard code.

Change-Id: I5d4a10d1da6b3ac5e65efd7f82607b56b80e08d4
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32961
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/intel/kunimitsu/romstage.c

@@ -20,12 +20,6 @@
 #include "gpio.h"
 #include "spd/spd.h"
 
-void mainboard_romstage_entry(struct romstage_params *params)
-{
-	/* Initialize memory */
-	romstage_common(params);
-}
-
 void mainboard_memory_init_params(struct romstage_params *params,
 				  MEMORY_INIT_UPD *memory_params)
 {