85xx: Update MPC85xx_PORDEVSR_IO_SEL mask

The MPC8572 has a 4-bit wide PORDEVSR IO_SEL field. Other MPC85xx
processors have a 3-bit wide IO_SEL field but have the most
significant bit is wired to 0 so this change should not affect
them.
Signed-off-by: NPeter Tyser <ptyser@xes-inc.com>

include/asm-ppc/immap_85xx.h

@@ -1568,7 +1568,7 @@ typedef struct ccsr_gur {
 #define MPC85xx_PORDEVSR_SGMII3_DIS	0x08000000
 #define MPC85xx_PORDEVSR_SGMII4_DIS	0x04000000
 #define MPC85xx_PORDEVSR_SRDS2_IO_SEL   0x38000000
-#define MPC85xx_PORDEVSR_IO_SEL		0x00380000
+#define MPC85xx_PORDEVSR_IO_SEL		0x00780000
 #define MPC85xx_PORDEVSR_PCI2_ARB	0x00040000
 #define MPC85xx_PORDEVSR_PCI1_ARB	0x00020000
 #define MPC85xx_PORDEVSR_PCI1_PCI32	0x00010000