firmware: google: add missing MODULE_DESCRIPTION() macros

firmware: google: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/gsmi.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/coreboot_table.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/framebuffer-coreboot.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/memconsole.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/memconsole-coreboot.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/memconsole-x86-legacy.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/cbmem.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/firmware/google/vpd-sysfs.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/20240605-md-drivers-firmware-google-v1-1-18878de97fa5@quicinc.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>