target/arm: Remove __attribute__((nonnull)) from ptw.c

This was added in 7e98e21 as part of a reorg in which
one of the argument had been legally NULL, and this caught
actual instances.  Now that the reorg is complete, this
serves little purpose.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230620124418.805717-10-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/ptw.c

@@ -34,15 +34,13 @@ typedef struct S1Translate {
 static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
                                uint64_t address,
                                MMUAccessType access_type, bool s1_is_el0,
-                               GetPhysAddrResult *result, ARMMMUFaultInfo *fi)
-    __attribute__((nonnull));
+                               GetPhysAddrResult *result, ARMMMUFaultInfo *fi);
 
 static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw,
                                       target_ulong address,
                                       MMUAccessType access_type,
                                       GetPhysAddrResult *result,
-                                      ARMMMUFaultInfo *fi)
-    __attribute__((nonnull));
+                                      ARMMMUFaultInfo *fi);
 
 /* This mapping is common between ID_AA64MMFR0.PARANGE and TCR_ELx.{I}PS. */
 static const uint8_t pamax_map[] = {