target/microblaze: use MMUAccessType instead of int in mmu_translate

Using MMUAccessType makes it more clear what the variable's use is.
No functional change.

Signed-off-by: Joe Komlodi <komlodi@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-Id: <1611274735-303873-3-git-send-email-komlodi@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

target/microblaze/mmu.c

@@ -74,7 +74,7 @@ static void mmu_change_pid(CPUMBState *env, unsigned int newpid)
 
 /* rw - 0 = read, 1 = write, 2 = fetch.  */
 unsigned int mmu_translate(MicroBlazeCPU *cpu, MicroBlazeMMULookup *lu,
-                           target_ulong vaddr, int rw, int mmu_idx)
+                           target_ulong vaddr, MMUAccessType rw, int mmu_idx)
 {
     MicroBlazeMMU *mmu = &cpu->env.mmu;
     unsigned int i, hit = 0;

target/microblaze/mmu.h

@@ -84,7 +84,7 @@ typedef struct {
 } MicroBlazeMMULookup;
 
 unsigned int mmu_translate(MicroBlazeCPU *cpu, MicroBlazeMMULookup *lu,
-                           target_ulong vaddr, int rw, int mmu_idx);
+                           target_ulong vaddr, MMUAccessType rw, int mmu_idx);
 uint32_t mmu_read(CPUMBState *env, bool ea, uint32_t rn);
 void mmu_write(CPUMBState *env, bool ea, uint32_t rn, uint32_t v);
 void mmu_init(MicroBlazeMMU *mmu);