staging: speakup: fix type mismatch warnings

Compiling speakup driver with sparse produces following warning:

drivers/staging/speakup/serialio.c:22:9: warning: incorrect type in
initializer (different base types)
drivers/staging/speakup/serialio.c:22:9: expected unsigned int
[unsigned] flags
drivers/staging/speakup/serialio.c:22:9: got restricted upf_t

This patch fixes it.

Signed-off-by: Okash Khawaja <[e-mail]>
Acked-by: Samuel Thibault <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/speakup/serialio.h

···
 #ifndef __sparc__
 #include <linux/serial.h>
 #endif
+#include <linux/serial_core.h>
 
 /*
  * this is cut&paste from 8250.h. Get rid of the structure, the definitions
···
 	unsigned int baud_base;
 	unsigned int port;
 	unsigned int irq;
-	unsigned int flags; /* unused */
+	upf_t flags; /* unused */
 };
 
 /* countdown values for serial timeouts in us */