hw/pci-hist/pnv_phb4: Fix typo in pnv_phb4_ioda_write

From clang-13:
hw/pci-host/pnv_phb4.c:375:18: error: variable 'v' set but not used \
    [-Werror,-Wunused-but-set-variable]

It's pretty clear that we meant to write back 'v' after
all that computation and not 'val'.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 54f57c6..5c375a9 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -392,7 +392,7 @@
             v &= 0xffffffffffff0000ull;
             v |= 0x000000000000cfffull & val;
         }
-        *tptr = val;
+        *tptr = v;
         break;
     }
     case IODA3_TBL_MBT: