platform/x86: add missing MODULE_DESCRIPTION() macros

With ARCH=x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/amilo-rfkill.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/uv_sysfs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/ibm_rtl.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/xo1-rfkill.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/firmware_attributes_class.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/platform/x86/wireless-hotkey.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240611-md-drivers-platform-x86-v1-1-d850e53619ee@quicinc.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>