src/mainboard: remove MMIO macros

This touches several mainboards. Replace the macro with C functions.
The presence of bootblock.c is assumed.

Change-Id: I583034ef0b0ed3e5a5e3dd680c57728ec5efbc8f
Signed-off-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37738
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/amd/thatcher/romstage.c

@@ -18,6 +18,7 @@
 #include <arch/io.h>
 #include <console/console.h>
 #include <device/pci_ops.h>
+#include <amdblocks/acpimmio.h>
 #include <northbridge/amd/agesa/state_machine.h>
 #include <southbridge/amd/agesa/hudson/hudson.h>
 #include <superio/smsc/lpc47n217/lpc47n217.h>
@@ -50,5 +51,5 @@ void board_BeforeAgesa(struct sysinfo *cb)
 	outb(0x1, 0xcd7);
 	outb(0xea, 0xcd6);
 	outb(0x1, 0xcd7);
-	*(u8 *)0xfed80101 = 0x98;
+	gpio_100_write8(0x1, 0x98);
 }