target/hppa: Switch to use MMU indices 11-15

The MMU indices 9-15 will use shorter assembler instructions
when run on a x86-64 host. So, switch over to those to get
smaller code and maybe minimally faster emulation.

Signed-off-by: Helge Deller <deller@gmx.de>

target/hppa/cpu.h

@@ -30,14 +30,14 @@
    basis.  It's probably easier to fall back to a strong memory model.  */
 #define TCG_GUEST_DEFAULT_MO        TCG_MO_ALL
 
-#define MMU_KERNEL_IDX   0
-#define MMU_PL1_IDX      1
-#define MMU_PL2_IDX      2
-#define MMU_USER_IDX     3
-#define MMU_PHYS_IDX     4
-
-#define PRIV_TO_MMU_IDX(priv)    (priv)
-#define MMU_IDX_TO_PRIV(mmu_idx) (mmu_idx)
+#define MMU_KERNEL_IDX   11
+#define MMU_PL1_IDX      12
+#define MMU_PL2_IDX      13
+#define MMU_USER_IDX     14
+#define MMU_PHYS_IDX     15
+
+#define PRIV_TO_MMU_IDX(priv)    (MMU_KERNEL_IDX + (priv))
+#define MMU_IDX_TO_PRIV(mmu_idx) ((mmu_idx) - MMU_KERNEL_IDX)
 
 #define TARGET_INSN_START_EXTRA_WORDS 1