mfd: Add missing MODULE_DESCRIPTION() macros

On x86, make allmodconfig && make W=1 C=1 reports:

 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/arizona.o
 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/pcf50633-gpio.o
 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/timberdale.o
 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/ssbi.o
 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/rt4831.o
 WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/mfd/intel_soc_pmic_bxtwc.o

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

This includes mfd-core.c and vexpress-sysreg.c which, although they
did not produce a warning with the x86 allmodconfig configuration, may
cause this warning with other configurations.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Andy Shevchenko <andy@kernel.org> # for Intel Broxton PMIC
Link: https://lore.kernel.org/r/20240609-md-drivers-mfd-v1-1-47cdd0b394e9@quicinc.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: jeff-t-johnson

drivers/mfd/arizona-core.c

@@ -1429,4 +1429,5 @@ int arizona_dev_exit(struct arizona *arizona)
 }
 EXPORT_SYMBOL_GPL(arizona_dev_exit);
 
+MODULE_DESCRIPTION("Wolfson Arizona core driver");
 MODULE_LICENSE("GPL v2");

drivers/mfd/intel_soc_pmic_bxtwc.c

@@ -581,5 +581,6 @@ static struct platform_driver bxtwc_driver = {
 
 module_platform_driver(bxtwc_driver);
 
+MODULE_DESCRIPTION("Intel Broxton Whiskey Cove PMIC MFD core driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Qipeng Zha <qipeng.zha@intel.com>");

drivers/mfd/mfd-core.c

@@ -436,5 +436,6 @@ int devm_mfd_add_devices(struct device *dev, int id,
 }
 EXPORT_SYMBOL(devm_mfd_add_devices);
 
+MODULE_DESCRIPTION("Core MFD support");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");

drivers/mfd/pcf50633-gpio.c

@@ -88,4 +88,5 @@ int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
 }
 EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);
 
+MODULE_DESCRIPTION("NXP PCF50633 GPIO Driver");
 MODULE_LICENSE("GPL");

drivers/mfd/rt4831.c

@@ -115,4 +115,5 @@ static struct i2c_driver rt4831_driver = {
 module_i2c_driver(rt4831_driver);
 
 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("Richtek RT4831 core driver");
 MODULE_LICENSE("GPL v2");

drivers/mfd/ssbi.c

@@ -319,6 +319,7 @@ static struct platform_driver ssbi_driver = {
 };
 module_platform_driver(ssbi_driver);
 
+MODULE_DESCRIPTION("Qualcomm Single-wire Serial Bus Interface (SSBI) driver");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION("1.0");
 MODULE_ALIAS("platform:ssbi");

drivers/mfd/timberdale.c

@@ -853,4 +853,5 @@ module_pci_driver(timberdale_pci_driver);
 
 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
 MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION("Timberdale FPGA MFD driver");
 MODULE_LICENSE("GPL v2");

drivers/mfd/vexpress-sysreg.c

@@ -132,4 +132,5 @@ static struct platform_driver vexpress_sysreg_driver = {
 };
 
 module_platform_driver(vexpress_sysreg_driver);
+MODULE_DESCRIPTION("Versatile Express system registers driver");
 MODULE_LICENSE("GPL v2");