target-microblaze: cpu_mmu_index: Fixup indentation

Fixup the indentation of cpu_mmu_index in preparation for
future edits.
No functional changes.
Reviewed-by: NAlistair Francis <alistair.francis@wdc.com>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>

target/microblaze/cpu.h

@@ -360,13 +360,15 @@ int cpu_mb_signal_handler(int host_signum, void *pinfo,
 
 static inline int cpu_mmu_index (CPUMBState *env, bool ifetch)
 {
-        /* Are we in nommu mode?.  */
-        if (!(env->sregs[SR_MSR] & MSR_VM))
-            return MMU_NOMMU_IDX;
-
-	if (env->sregs[SR_MSR] & MSR_UM)
-            return MMU_USER_IDX;
-        return MMU_KERNEL_IDX;
+    /* Are we in nommu mode?.  */
+    if (!(env->sregs[SR_MSR] & MSR_VM)) {
+        return MMU_NOMMU_IDX;
+    }
+
+    if (env->sregs[SR_MSR] & MSR_UM) {
+        return MMU_USER_IDX;
+    }
+    return MMU_KERNEL_IDX;
 }
 
 int mb_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size, int rw,