MIPS: BCM47XX: Enable buttons support on SSB

This is supported since implementing IRQ domain in ssb.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6315/

arch/mips/bcm47xx/buttons.c

@@ -3,7 +3,6 @@
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
 #include <linux/interrupt.h>
-#include <linux/ssb/ssb_embedded.h>
 #include <bcm47xx_board.h>
 #include <bcm47xx.h>
 
@@ -359,13 +358,6 @@ int __init bcm47xx_buttons_register(void)
 	enum bcm47xx_board board = bcm47xx_board_get();
 	int err;
 
-#ifdef CONFIG_BCM47XX_SSB
-	if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_SSB) {
-		pr_debug("Buttons on SSB are not supported yet.\n");
-		return -ENOTSUPP;
-	}
-#endif
-
 	switch (board) {
 	case BCM47XX_BOARD_ASUS_RTN12:
 		err = bcm47xx_copy_bdata(bcm47xx_buttons_asus_rtn12);