firmware: google: make structure gsmi_dev static

The structure gsmi_dev is local to the source and does not need to be
in global scope, so make it static.

Cleans up sparse warning:
symbol 'gsmi_dev' was not declared. Should it be static?

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Jean Delvare <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/firmware/google/gsmi.c

···
 	u32 address;			/* physical address of buffer */
 };
 
-struct gsmi_device {
+static struct gsmi_device {
 	struct platform_device *pdev;	/* platform device */
 	struct gsmi_buf *name_buf;	/* variable name buffer */
 	struct gsmi_buf *data_buf;	/* generic data buffer */