Moved the AMD K5 and K6 CPU's and the ATi VGA Wonder XL24 to the Dev branch;

Turned the char arrays in gameport.h into const char pointers;
The makefile no longer links in the (unfinished) PIIX4 emulation code (which is currently not used by anything even in the Dev branch).

src/win/Makefile.mingw

@@ -8,7 +8,7 @@
 #
 #		Makefile for Win32 (MinGW32) environment.
 #
-# Version:	@(#)Makefile.mingw	1.0.102	2018/02/18
+# Version:	@(#)Makefile.mingw	1.0.103	2018/02/18
 #
 # Authors:	Miran Grca, <mgrca8@gmail.com>
 #               Fred N. van Kempen, <decwiz@yahoo.com>
@@ -58,6 +58,9 @@ endif
 ifndef DEV_BRANCH
 DEV_BRANCH	:= n
 endif
+ifndef AMD_K
+AMD_K		:= n
+endif
 ifndef CRASHDUMP
 CRASHDUMP	:= n
 endif
@@ -91,6 +94,9 @@ endif
 ifndef STEALTH32
 STEALTH32	:= n
 endif
+ifndef XL24
+XL24		:= n
+endif
 ifndef DYNAREC
 DYNAREC		:= y
 endif
@@ -108,6 +114,7 @@ endif
 ifeq ($(DEV_BUILD), y)
 DEBUG		:= y
 DEV_BRANCH	:= y
+AMD_K		:= y
 CRASHDUMP	:= y
 GREENB		:= y
 I686		:= y
@@ -117,6 +124,7 @@ PAS16		:= y
 PORTABLE3	:= y
 STEALTH32	:= y
 VNC		:= y
+XL24		:= y
 endif
 
 # WxWidgets basic info. Extract using the config program.
@@ -301,6 +309,10 @@ ifeq ($(DEV_BRANCH), y)
 OPTS		+= -DDEV_BRANCH
 DEVBROBJ	:=
 
+ifeq ($(AMD_K), y)
+OPTS		+= -DUSE_AMD_K
+endif
+
 ifeq ($(CRASHDUMPOBJ), y)
 OPTS		+= -DUSE_CRASHDUMP
 DEVBROBJ	+= win_crashdump.o
@@ -340,6 +352,10 @@ OPTS		+= -DUSE_STEALTH32
 DEVBROBJ	+= vid_icd2061.o
 endif
 
+ifeq ($(XL24), y)
+OPTS		+= -DUSE_XL24
+endif
+
 endif
 
 
@@ -370,8 +386,7 @@ MAINOBJ		:= pc.o config.o random.o timer.o io.o dma.o nmi.o pic.o \
 
 INTELOBJ	:= intel.o \
 		    intel_flash.o \
-		    intel_sio.o \
-		    intel_piix.o intel_piix4.o
+		    intel_sio.o intel_piix.o
 
 CPUOBJ		:= cpu.o cpu_table.o \
 		    808x.o 386.o 386_dynarec.o \