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MISRA Advisory Rule 2.5 states that a project should not contain unused macro declarations. While most of the violations in the nvgpu driver are due to unused macros from hw headers, devinit-related headers, etc. there is a small number that are due to things like: * macros not being used when they could/should be * macros in C files that are really not referenced * CPP build flag mismatches This change eliminates such violations from the following: * replace constants with existing macros in timeout conversion code * wrap nvgpu_gmmu_dbg macro #defines in #ifdef CONFIG_NVGPU_TRACE/#endif * wrap MAX_MC_INTR_REGS #define in #ifdef CONFIG_NVGPU_NON_FUSA/#endif * remove unused FECS_MAILBOX_0_ACK_RESTORE from runlist code * wrap BACKTRACE_MAXSIZE macro with #ifndef _QNX_SOURCE/#endif Jira NVGPU-3178 Change-Id: I2bc72f706d7af3f8e7b062126e8543d0dc8ac250 Signed-off-by: Scott Long <scottl@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2284419 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com> Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com> Reviewed-by: Vedashree Vidwans <vvidwans@nvidia.com> Reviewed-by: Sagar Kamble <skamble@nvidia.com> Reviewed-by: Adeel Raza <araza@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit