Add a sentinel to the ARMASIdx enum so it can be used when the total
number of address spaces is required.

Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
---
 target/arm/cpu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 39f2b2e54d..718d140712 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -2336,6 +2336,8 @@ typedef enum ARMASIdx {
     ARMASIdx_S = 1,
     ARMASIdx_TagNS = 2,
     ARMASIdx_TagS = 3,
+    ARMASIdx_MAX = ARMASIdx_TagS
+#define ARMASIdx_COUNT (ARMASIdx_MAX + 1)
 } ARMASIdx;
 
 static inline ARMMMUIdx arm_space_to_phys(ARMSecuritySpace space)
-- 
2.34.1