powerpc/8xxx: Refactor SRIO initialization into common code

Moved the SRIO init out of corenet_ds and into common code for
8xxx/QorIQ processors that have SRIO.  We mimic what we do with PCIe
controllers for SRIO.

We utilize the fact that SRIO is over serdes to determine if its
configured or not and thus can setup the LAWs needed for it dynamically.

We additionally update the device tree (to remove the SRIO nodes) if the
board doesn't have SRIO enabled.

Introduced the following standard defines for board config.h:

CONFIG_SYS_SRIO - Chip has SRIO or not
CONFIG_SRIO1 - Board has SRIO 1 port available
CONFIG_SRIO2 - Board has SRIO 2 port available

(where 'n' is the port #)
CONFIG_SYS_SRIOn_MEM_VIRT - virtual address in u-boot
CONFIG_SYS_SRIOn_MEM_PHYS - physical address (for law setup)
CONFIG_SYS_SRIOn_MEM_SIZE - size of window (for law setup)

[ These mimic what we have for PCI and PCIe controllers ]

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>
diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c
index 53e0596..00fa752 100644
--- a/arch/powerpc/cpu/mpc85xx/fdt.c
+++ b/arch/powerpc/cpu/mpc85xx/fdt.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2010 Freescale Semiconductor, Inc.
+ * Copyright 2007-2011 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -38,6 +38,7 @@
 
 extern void ft_qe_setup(void *blob);
 extern void ft_fixup_num_cores(void *blob);
+extern void ft_srio_setup(void *blob);
 
 #ifdef CONFIG_MP
 #include "mp.h"
@@ -478,4 +479,8 @@
 
 	fdt_fixup_qportals(blob);
 #endif
+
+#ifdef CONFIG_SYS_SRIO
+	ft_srio_setup(blob);
+#endif
 }