perf: add missing MODULE_DESCRIPTION() macros

With ARCH=x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/arm-ccn.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/fsl_imx8_ddr_perf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/marvell_cn10k_ddr_pmu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/arm_cspmu/arm_cspmu_module.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/arm_cspmu/nvidia_cspmu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/arm_cspmu/ampere_cspmu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/perf/cxl_pmu.o

Add the missing invocation of the MODULE_DESCRIPTION() macro to all
files which have a MODULE_LICENSE().

This includes drivers/perf/hisilicon/hisi_uncore_pmu.c which, although
it did not produce a warning with the x86 allmodconfig configuration,
may cause this warning with arm64 configurations.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240709-md-drivers-perf-v3-1-513275b75ed0@quicinc.comSigned-off-by: Will Deacon <will@kernel.org>

drivers/perf/arm-ccn.c

@@ -1561,4 +1561,5 @@ module_init(arm_ccn_init);
 module_exit(arm_ccn_exit);
 
 MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
+MODULE_DESCRIPTION("ARM CCN (Cache Coherent Network) Performance Monitor Driver");
 MODULE_LICENSE("GPL v2");

drivers/perf/arm_cspmu/ampere_cspmu.c

@@ -269,4 +269,5 @@ static void __exit ampere_cspmu_exit(void)
 module_init(ampere_cspmu_init);
 module_exit(ampere_cspmu_exit);
 
+MODULE_DESCRIPTION("Ampere SoC Performance Monitor Driver");
 MODULE_LICENSE("GPL");

drivers/perf/arm_cspmu/arm_cspmu.c

@@ -1427,4 +1427,5 @@ EXPORT_SYMBOL_GPL(arm_cspmu_impl_unregister);
 module_init(arm_cspmu_init);
 module_exit(arm_cspmu_exit);
 
+MODULE_DESCRIPTION("ARM CoreSight Architecture Performance Monitor Driver");
 MODULE_LICENSE("GPL v2");

drivers/perf/arm_cspmu/nvidia_cspmu.c

@@ -417,4 +417,5 @@ static void __exit nvidia_cspmu_exit(void)
 module_init(nvidia_cspmu_init);
 module_exit(nvidia_cspmu_exit);
 
+MODULE_DESCRIPTION("NVIDIA Coresight Architecture Performance Monitor Driver");
 MODULE_LICENSE("GPL v2");

drivers/perf/cxl_pmu.c

@@ -972,6 +972,7 @@ static __exit void cxl_pmu_exit(void)
 	cpuhp_remove_multi_state(cxl_pmu_cpuhp_state_num);
 }
 
+MODULE_DESCRIPTION("CXL Performance Monitor Driver");
 MODULE_LICENSE("GPL");
 MODULE_IMPORT_NS(CXL);
 module_init(cxl_pmu_init);

drivers/perf/fsl_imx8_ddr_perf.c

@@ -850,4 +850,5 @@ static struct platform_driver imx_ddr_pmu_driver = {
 };
 
 module_platform_driver(imx_ddr_pmu_driver);
+MODULE_DESCRIPTION("Freescale i.MX8 DDR Performance Monitor Driver");
 MODULE_LICENSE("GPL v2");

drivers/perf/hisilicon/hisi_uncore_pmu.c

@@ -537,4 +537,5 @@ void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module)
 }
 EXPORT_SYMBOL_GPL(hisi_pmu_init);
 
+MODULE_DESCRIPTION("HiSilicon SoC uncore Performance Monitor driver framework");
 MODULE_LICENSE("GPL v2");

drivers/perf/marvell_cn10k_ddr_pmu.c

@@ -763,4 +763,5 @@ module_init(cn10k_ddr_pmu_init);
 module_exit(cn10k_ddr_pmu_exit);
 
 MODULE_AUTHOR("Bharat Bhushan <bbhushan2@marvell.com>");
+MODULE_DESCRIPTION("Marvell CN10K DRAM Subsystem (DSS) Performance Monitor Driver");
 MODULE_LICENSE("GPL v2");