target/arm: Remove route_to_el2 check from sve_exception_el

We handle this routing in raise_exception.  Promoting the value early
means that we can't directly compare FPEXC_EL and SVEEXC_EL.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220607203306.657998-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/helper.c

@@ -6149,8 +6149,7 @@ int sve_exception_el(CPUARMState *env, int el)
             /* fall through */
         case 0:
         case 2:
-            /* route_to_el2 */
-            return hcr_el2 & HCR_TGE ? 2 : 1;
+            return 1;
         }
 
         /* Check CPACR.FPEN.  */