target/arm: enable FEAT_RNG on Neoverse-N2

I noticed that Neoverse-V1 has FEAT_RNG enabled so let enable it also on
Neoverse-N2.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20231114103443.1652308-1-marcin.juszkiewicz@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/tcg/cpu64.c

@@ -1018,7 +1018,7 @@ static void aarch64_neoverse_n2_initfn(Object *obj)
     cpu->isar.id_aa64dfr1  = 0;
     cpu->id_aa64afr0       = 0;
     cpu->id_aa64afr1       = 0;
-    cpu->isar.id_aa64isar0 = 0x0221111110212120ull; /* with Crypto */
+    cpu->isar.id_aa64isar0 = 0x1221111110212120ull; /* with Crypto and FEAT_RNG */
     cpu->isar.id_aa64isar1 = 0x0011111101211052ull;
     cpu->isar.id_aa64mmfr0 = 0x0000022200101125ull;
     cpu->isar.id_aa64mmfr1 = 0x0000000010212122ull;