ARM: OMAP: hwmod code: remove unused hwmod function prototypes

Several hwmod function prototypes appear to not have an implementation
because the corresponding functions were removed or renamed.
Those prototypes are unneeded anymore - remove them.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
[paul@pwsan.com: tweaked subject]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/plat-omap/include/plat/omap_hwmod.h

@@ -591,9 +591,7 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
 int __init omap_hwmod_setup_one(const char *name);
 
 int omap_hwmod_enable(struct omap_hwmod *oh);
-int _omap_hwmod_enable(struct omap_hwmod *oh);
 int omap_hwmod_idle(struct omap_hwmod *oh);
-int _omap_hwmod_idle(struct omap_hwmod *oh);
 int omap_hwmod_shutdown(struct omap_hwmod *oh);
 
 int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name);
@@ -626,11 +624,6 @@ int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
 int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
 				 struct omap_hwmod *init_oh);
 
-int omap_hwmod_set_clockact_both(struct omap_hwmod *oh);
-int omap_hwmod_set_clockact_main(struct omap_hwmod *oh);
-int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh);
-int omap_hwmod_set_clockact_none(struct omap_hwmod *oh);
-
 int omap_hwmod_enable_wakeup(struct omap_hwmod *oh);
 int omap_hwmod_disable_wakeup(struct omap_hwmod *oh);