OMAP: powerdomain: remove unused func declaration

Trivial fix to remove the unused function declaration
from the powerdomain header.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/mach-omap2/powerdomain.h

@@ -165,7 +165,6 @@ struct pwrdm_ops {
 	int	(*pwrdm_wait_transition)(struct powerdomain *pwrdm);
 };
 
-void pwrdm_fw_init(void);
 void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs);
 
 struct powerdomain *pwrdm_lookup(const char *name);