AMD K8 fam10-15: Consolidate post_cache_as_ram call

Change-Id: I5e7890aafbc8c80716ee49690e306482a482a863
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/20573
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>

src/mainboard/iei/kino-780am2-fam10/romstage.c

@@ -218,8 +218,6 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	sb7xx_51xx_before_pci_init();
 
 	post_code(0x42);
-	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
-	post_code(0x43);	// Should never see this post code.
 }
 
 /**