Staging: speakup: Remove 'extern' keywords from .h prototypes

Addresses checkpatch.pl check:
CHECK: Extern prototypes should be avoided in .h files

Removes the 'extern' keyword from function prototypes
Signed-off-by: Katie Dunne <kdunne@mail.ccsf.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/speakup/spk_priv.h

@@ -44,34 +44,34 @@
 
 #define KT_SPKUP 15
 
-extern const struct old_serial_port *spk_serial_init(int index);
-extern void spk_stop_serial_interrupt(void);
-extern int spk_wait_for_xmitr(void);
-extern unsigned char spk_serial_in(void);
-extern unsigned char spk_serial_in_nowait(void);
-extern int spk_serial_out(const char ch);
-extern void spk_serial_release(void);
+const struct old_serial_port *spk_serial_init(int index);
+void spk_stop_serial_interrupt(void);
+int spk_wait_for_xmitr(void);
+unsigned char spk_serial_in(void);
+unsigned char spk_serial_in_nowait(void);
+int spk_serial_out(const char ch);
+void spk_serial_release(void);
 
-extern char synth_buffer_getc(void);
-extern char synth_buffer_peek(void);
-extern int synth_buffer_empty(void);
-extern struct var_t *spk_get_var(enum var_id_t var_id);
-extern ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
+char synth_buffer_getc(void);
+char synth_buffer_peek(void);
+int synth_buffer_empty(void);
+struct var_t *spk_get_var(enum var_id_t var_id);
+ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
 		     char *buf);
-extern ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
+ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
 		      const char *buf, size_t count);
 
-extern int spk_serial_synth_probe(struct spk_synth *synth);
-extern const char *spk_synth_immediate(struct spk_synth *synth, const char *buff);
-extern void spk_do_catch_up(struct spk_synth *synth);
-extern void spk_synth_flush(struct spk_synth *synth);
-extern int spk_synth_is_alive_nop(struct spk_synth *synth);
-extern int spk_synth_is_alive_restart(struct spk_synth *synth);
-extern void synth_printf(const char *buf, ...);
-extern int synth_request_region(u_long, u_long);
-extern int synth_release_region(u_long, u_long);
-extern int synth_add(struct spk_synth *in_synth);
-extern void synth_remove(struct spk_synth *in_synth);
+int spk_serial_synth_probe(struct spk_synth *synth);
+const char *spk_synth_immediate(struct spk_synth *synth, const char *buff);
+void spk_do_catch_up(struct spk_synth *synth);
+void spk_synth_flush(struct spk_synth *synth);
+int spk_synth_is_alive_nop(struct spk_synth *synth);
+int spk_synth_is_alive_restart(struct spk_synth *synth);
+void synth_printf(const char *buf, ...);
+int synth_request_region(u_long, u_long);
+int synth_release_region(u_long, u_long);
+int synth_add(struct spk_synth *in_synth);
+void synth_remove(struct spk_synth *in_synth);
 
 extern struct speakup_info_t speakup_info;