Input: keyboard - staticise non-exported symbols

These symbols are not used outside it's driver so no need to
make the symbol global.

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Michael Hennerich <[e-mail]>
Acked-by: Linus Walleij <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/bf54x-keys.c

···
 # define bfin_kpad_resume  NULL
 #endif
 
-struct platform_driver bfin_kpad_device_driver = {
+static struct platform_driver bfin_kpad_device_driver = {
 	.driver		= {
 		.name	= DRV_NAME,
 		.owner	= THIS_MODULE,

drivers/input/keyboard/nomadik-ske-keypad.c

···
 };
 #endif
 
-struct platform_driver ske_keypad_driver = {
+static struct platform_driver ske_keypad_driver = {
 	.driver = {
 		.name = "nmk-ske-keypad",
 		.owner  = THIS_MODULE,