irqchip/irq-bcm7038-l1: Remove unused reg_mask_status()

reg_mask_status() is not referenced anywhere leading to W=1 warning:

irq-bcm7038-l1.c:85:28: error: unused function 'reg_mask_status' [-Werror,-Wunused-function]

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Florian Fainelli <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/irqchip/irq-bcm7038-l1.c

···
 	return (0 * intc->n_words + word) * sizeof(u32);
 }
 
-static inline unsigned int reg_mask_status(struct bcm7038_l1_chip *intc,
-					   unsigned int word)
-{
-	return (1 * intc->n_words + word) * sizeof(u32);
-}
-
 static inline unsigned int reg_mask_set(struct bcm7038_l1_chip *intc,
 					unsigned int word)
 {