target-sh4: MMU: fix ITLB priviledge check

There is an ITLB access violation if SR_MD=0 (user mode) while
the high bit of the protection key is 0 (priviledge mode).
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
(cherry picked from commit bc13ad29e6b7484ccd5e7ee0f5d0f966585eb4c9)

target-sh4/helper.c

@@ -377,7 +377,7 @@ static int get_mmu_address(CPUState * env, target_ulong * physical,
 	n = find_itlb_entry(env, address, use_asid, 1);
 	if (n >= 0) {
 	    matching = &env->itlb[n];
-	    if ((env->sr & SR_MD) & !(matching->pr & 2))
+	    if (!(env->sr & SR_MD) && !(matching->pr & 2))
 		n = MMU_ITLB_VIOLATION;
 	    else
 		*prot = PAGE_READ;