spi: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spi/spi-altera-core.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spi/spi-fsl-lib.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spi/spi-omap2-mcspi.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/spi/spi-qup.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-altera-core.c

···
 }
 EXPORT_SYMBOL_GPL(altera_spi_init_host);
 
+MODULE_DESCRIPTION("Altera SPI Controller driver core");
 MODULE_LICENSE("GPL");

drivers/spi/spi-fsl-cpm.c

···
 }
 EXPORT_SYMBOL_GPL(fsl_spi_cpm_free);
 
+MODULE_DESCRIPTION("Freescale SPI controller driver CPM functions");
 MODULE_LICENSE("GPL");

drivers/spi/spi-fsl-lib.c

···
 }
 EXPORT_SYMBOL_GPL(of_mpc8xxx_spi_probe);
 
+MODULE_DESCRIPTION("Freescale SPI/eSPI controller driver library");
 MODULE_LICENSE("GPL");

drivers/spi/spi-omap-uwire.c

···
 subsys_initcall(omap_uwire_init);
 module_exit(omap_uwire_exit);
 
+MODULE_DESCRIPTION("MicroWire interface driver for OMAP");
 MODULE_LICENSE("GPL");
 

drivers/spi/spi-omap2-mcspi.c

···
 };
 
 module_platform_driver(omap2_mcspi_driver);
+MODULE_DESCRIPTION("OMAP2 McSPI controller driver");
 MODULE_LICENSE("GPL");

drivers/spi/spi-qup.c

···
 };
 module_platform_driver(spi_qup_driver);
 
+MODULE_DESCRIPTION("Qualcomm SPI controller with QUP interface");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:spi_qup");