s390/pci: adjust IOMAP_MAX_ENTRIES

ZPCI_IOMAP_MAX_ENTRIES is off by one. Let's adjust this
for the sake of correctness.
Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: NGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/pci_io.h

@@ -8,7 +8,7 @@
 #include <asm/pci_insn.h>
 
 /* I/O Map */
-#define ZPCI_IOMAP_MAX_ENTRIES		0x7fff
+#define ZPCI_IOMAP_MAX_ENTRIES		0x8000
 #define ZPCI_IOMAP_ADDR_BASE		0x8000000000000000ULL
 #define ZPCI_IOMAP_ADDR_IDX_MASK	0x7fff000000000000ULL
 #define ZPCI_IOMAP_ADDR_OFF_MASK	0x0000ffffffffffffULL