clk: vexpress-osc: add missing MODULE_DESCRIPTION() macro

With ARCH=arm64, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/versatile/clk-vexpress-osc.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Sudeep Holla <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/versatile/clk-vexpress-osc.c

···
 	.probe = vexpress_osc_probe,
 };
 module_platform_driver(vexpress_osc_driver);
+MODULE_DESCRIPTION("Clock driver for Versatile Express OSC clock generators");
 MODULE_LICENSE("GPL v2");