phb4: Fix number of index bits in IODA tables

On PHB4 the number of index bits in the IODA table address register
was bumped to 10 bits to accomodate for 1024 MSIs and 1024 TVEs (DD2).

However our macro only defined the field to be 9 bits, thus causing
"interesting" behaviours on some systems.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

include/phb4-regs.h

@@ -97,7 +97,7 @@
 #define   PHB_IODA_AD_AUTOINC		PPC_BIT(0)
 #define	  PHB_IODA_AD_TSEL		PPC_BITMASK(11,15)
 #define	  PHB_IODA_AD_MIST_PWV		PPC_BITMASK(28,31)
-#define	  PHB_IODA_AD_TADR		PPC_BITMASK(55,63)
+#define	  PHB_IODA_AD_TADR		PPC_BITMASK(54,63)
 #define PHB_IODA_DATA0			0x228
 #define PHB_FFI_REQUEST			0x238
 #define   PHB_FFI_LOCK_CLEAR		PPC_BIT(3)