serial: Remove serial_putc_raw_dev

clang-3.8 reports that serial_putc_raw_dev in serial_ns16550.c is
unused.  Further investigation shows that we have 3 places that
implement this function and no callers, remove.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/powerpc/cpu/mpc512x/serial.c

@@ -203,18 +203,6 @@ void serial_putc_dev(unsigned int idx, const char c)
 	out_8(&psc->tfdata_8, c);
 }
 
-void serial_putc_raw_dev(unsigned int idx, const char c)
-{
-	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
-	volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
-	/* Wait for last character to go. */
-	while (!(in_be16(&psc->psc_status) & PSC_SR_TXEMP))
-		;
-
-	out_8(&psc->tfdata_8, c);
-}
-
 void serial_puts_dev(unsigned int idx, const char *s)
 {
 	while (*s)

arch/powerpc/cpu/mpc5xxx/serial.c

@@ -112,17 +112,6 @@ void serial_putc_dev (unsigned long dev_base, const char c)
 	psc->psc_buffer_8 = c;
 }
 
-void serial_putc_raw_dev(unsigned long dev_base, const char c)
-{
-	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
-	/* Wait for last character to go. */
-	while (!(psc->psc_status & PSC_SR_TXEMP))
-		;
-
-	psc->psc_buffer_8 = c;
-}
-
-
 void serial_puts_dev (unsigned long dev_base, const char *s)
 {
 	while (*s) {

drivers/serial/serial_ns16550.c

@@ -127,11 +127,6 @@ static void _serial_putc(const char c, const int port)
 	NS16550_putc(PORT, c);
 }
 
-static void _serial_putc_raw(const char c, const int port)
-{
-	NS16550_putc(PORT, c);
-}
-
 static void _serial_puts(const char *s, const int port)
 {
 	while (*s) {
@@ -164,12 +159,6 @@ serial_putc_dev(unsigned int dev_index,const char c)
 	_serial_putc(c,dev_index);
 }
 
-static inline void
-serial_putc_raw_dev(unsigned int dev_index,const char c)
-{
-	_serial_putc_raw(c,dev_index);
-}
-
 static inline void
 serial_puts_dev(unsigned int dev_index,const char *s)
 {