[POWERPC] PS3: Frame buffer system-bus rework

Convert the ps3fb device from a platform device to a PS3 system bus device.
Fix the remove and shutdown methods to support kexec and to make ps3fb a
loadable module.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/ps3/setup.c

@@ -107,7 +107,7 @@ static void ps3_panic(char *str)
 	while(1);
 }
 
-#ifdef CONFIG_FB_PS3
+#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
 static void prealloc(struct ps3_prealloc *p)
 {
 	if (!p->size)
@@ -125,10 +125,11 @@ static void prealloc(struct ps3_prealloc *p)
 }
 
 struct ps3_prealloc ps3fb_videomemory = {
-    .name = "ps3fb videomemory",
-    .size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
-    .align = 1024*1024			/* the GPU requires 1 MiB alignment */
+	.name = "ps3fb videomemory",
+	.size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
+	.align = 1024*1024		/* the GPU requires 1 MiB alignment */
 };
+EXPORT_SYMBOL_GPL(ps3fb_videomemory);
 #define prealloc_ps3fb_videomemory()	prealloc(&ps3fb_videomemory)
 
 static int __init early_parse_ps3fb(char *p)

drivers/video/Kconfig

@@ -1790,8 +1790,8 @@ config FB_IBM_GXT4500
 	  adaptor, found on some IBM System P (pSeries) machines.
 
 config FB_PS3
-	bool "PS3 GPU framebuffer driver"
-	depends on (FB = y) && PS3_PS3AV
+	tristate "PS3 GPU framebuffer driver"
+	depends on FB && PS3_PS3AV
 	select FB_SYS_FILLRECT
 	select FB_SYS_COPYAREA
 	select FB_SYS_IMAGEBLIT