s390x/gdb: coding style fixes

This patch cleanes up two coding style issues (missing whitespaces).
Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>

target-s390x/gdbstub.c

@@ -41,7 +41,7 @@ int s390_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
     case S390_PSWA_REGNUM:
         return gdb_get_regl(mem_buf, env->psw.addr);
     case S390_R0_REGNUM ... S390_R15_REGNUM:
-        return gdb_get_regl(mem_buf, env->regs[n-S390_R0_REGNUM]);
+        return gdb_get_regl(mem_buf, env->regs[n - S390_R0_REGNUM]);
     }
     return 0;
 }
@@ -63,7 +63,7 @@ int s390_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
         env->psw.addr = tmpl;
         break;
     case S390_R0_REGNUM ... S390_R15_REGNUM:
-        env->regs[n-S390_R0_REGNUM] = tmpl;
+        env->regs[n - S390_R0_REGNUM] = tmpl;
         break;
     default:
         return 0;