arch/arm64,arm: Prepare for !SEPARATE_ROMSTAGE

Prepare platforms for linking romstage code in the bootblock.

Change-Id: Ic20799b4d6e3f62cd05791a2bd275000a12cc83c
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63420
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/emulation/qemu-armv7/romstage.c

@@ -3,12 +3,16 @@
 #include <cbmem.h>
 #include <console/console.h>
 #include <program_loading.h>
+#include <romstage_common.h>
 
 void main(void)
 {
 	console_init();
+	romstage_main();
+}
 
+void __noreturn romstage_main(void)
+{
 	cbmem_initialize_empty();
-
 	run_ramstage();
 }