powerpc: add missing MODULE_DESCRIPTION() macros

With ARCH=powerpc, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/kernel/rtas_flash.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/sysdev/rtc_cmos_setup.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/platforms/pseries/papr_scm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/platforms/cell/spufs/spufs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/platforms/cell/cbe_thermal.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/platforms/cell/cpufreq_spudemand.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/powerpc/platforms/cell/cbe_powerbutton.o

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

This includes 85xx/t1042rdb_diu.c and chrp/nvram.c which, although
they did not produce a warning with the powerpc allmodconfig
configuration, may cause this warning with other configurations.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240615-md-powerpc-arch-powerpc-v1-1-ba4956bea47a@quicinc.com

arch/powerpc/kernel/rtas_flash.c

@@ -773,4 +773,5 @@ static void __exit rtas_flash_cleanup(void)
 
 module_init(rtas_flash_init);
 module_exit(rtas_flash_cleanup);
+MODULE_DESCRIPTION("PPC procfs firmware flash interface");
 MODULE_LICENSE("GPL");

arch/powerpc/platforms/85xx/t1042rdb_diu.c

@@ -149,4 +149,5 @@ static int __init t1042rdb_diu_init(void)
 
 early_initcall(t1042rdb_diu_init);
 
+MODULE_DESCRIPTION("Freescale T1042 DIU driver");
 MODULE_LICENSE("GPL");

arch/powerpc/platforms/cell/cbe_powerbutton.c

@@ -101,5 +101,6 @@ static void __exit cbe_powerbutton_exit(void)
 module_init(cbe_powerbutton_init);
 module_exit(cbe_powerbutton_exit);
 
+MODULE_DESCRIPTION("Driver for powerbutton on IBM cell blades");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");

arch/powerpc/platforms/cell/cbe_thermal.c

@@ -381,6 +381,7 @@ static void __exit thermal_exit(void)
 }
 module_exit(thermal_exit);
 
+MODULE_DESCRIPTION("Cell processor thermal driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
 

arch/powerpc/platforms/cell/cpufreq_spudemand.c

@@ -129,5 +129,6 @@ static struct cpufreq_governor spu_governor = {
 cpufreq_governor_init(spu_governor);
 cpufreq_governor_exit(spu_governor);
 
+MODULE_DESCRIPTION("SPU-aware cpufreq governor for the cell processor");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");

arch/powerpc/platforms/cell/spufs/inode.c

@@ -822,6 +822,7 @@ static void __exit spufs_exit(void)
 }
 module_exit(spufs_exit);
 
+MODULE_DESCRIPTION("SPU file system");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
 

arch/powerpc/platforms/chrp/nvram.c

@@ -92,4 +92,5 @@ void __init chrp_nvram_init(void)
 	return;
 }
 
+MODULE_DESCRIPTION("PPC NVRAM device driver");
 MODULE_LICENSE("GPL v2");

arch/powerpc/platforms/pseries/papr_scm.c

@@ -1536,5 +1536,6 @@ static void __exit papr_scm_exit(void)
 module_exit(papr_scm_exit);
 
 MODULE_DEVICE_TABLE(of, papr_scm_match);
+MODULE_DESCRIPTION("PAPR Storage Class Memory interface driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("IBM Corporation");

arch/powerpc/sysdev/rtc_cmos_setup.c

@@ -66,4 +66,5 @@ static int  __init add_rtc(void)
 }
 fs_initcall(add_rtc);
 
+MODULE_DESCRIPTION("PPC RTC CMOS driver");
 MODULE_LICENSE("GPL");