parisc: Fix debug name of CPU_HPA_xx if xx >= 10

Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/src/parisc/parisc.c b/src/parisc/parisc.c
index ca0556e..653a290 100644
--- a/src/parisc/parisc.c
+++ b/src/parisc/parisc.c
@@ -362,9 +362,9 @@
 
     /* could be one of the SMP CPUs */
     for (i = 1; i < smp_cpus; i++) {
-        static char CPU_TXT[] = "CPU_HPA_x";
+        static char CPU_TXT[] = "CPU_HPA_0";
         if (hpa == CPU_HPA_IDX(i)) {
-            CPU_TXT[8] = '0'+i;
+            CPU_TXT[8] = i < 10 ? '0' + i : 'A' - 10 + i;
             return CPU_TXT;
         }
     }