x86: Unify arch/io.h and arch/romcc_io.h

Here's the great news: From now on you don't have to worry about
hitting the right io.h include anymore. Just forget about romcc_io.h
and use io.h instead. This cleanup has a number of advantages, like
you don't have to guard device/ includes for SMM and pre RAM
anymore. This allows to get rid of a number of ifdefs and will
generally make the code more readable and understandable.

Potentially in the future some of the code in the io.h __PRE_RAM__
path should move to device.h or other device/ includes instead,
but that's another incremental change.

Change-Id: I356f06110e2e355e9a5b4b08c132591f36fec7d9
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2872
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/lib/ne2k.c

@@ -38,7 +38,6 @@ SMC8416 PIO support added by Andrew Bettison (andrewb@zip.com.au) on 4/3/02
 #include <ip_checksum.h>
 #include <console/ne2k.h>
 #include <arch/io.h>
-//#include <arch/romcc_io.h>
 
 #define MEM_SIZE MEM_32768
 #define TX_START 64
@@ -343,8 +342,6 @@ void ne2k_transmit(unsigned int eth_nic_base) {
 
 #ifdef __PRE_RAM__
 
-#include <arch/romcc_io.h>
-
 static void ns8390_reset(unsigned int eth_nic_base)
 {
 	int i;