pwm: imx: increase support up to PWM8 for i.MX6SX

This patch increases supported PWMs from previously PWM4 now up to PWM8
if i.MX6SX is in use.

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>

drivers/pwm/pwm-imx-util.c

@@ -15,7 +15,7 @@
 #include <div64.h>
 #include <asm/arch/imx-regs.h>
 
-/* pwm_id from 0..3 */
+/* pwm_id from 0..7 */
 struct pwm_regs *pwm_id_to_reg(int pwm_id)
 {
 	switch (pwm_id) {
@@ -27,6 +27,16 @@ struct pwm_regs *pwm_id_to_reg(int pwm_id)
 		return (struct pwm_regs *)PWM3_BASE_ADDR;
 	case 3:
 		return (struct pwm_regs *)PWM4_BASE_ADDR;
+#ifdef CONFIG_MX6SX
+	case 4:
+		return (struct pwm_regs *)PWM5_BASE_ADDR;
+	case 5:
+		return (struct pwm_regs *)PWM6_BASE_ADDR;
+	case 6:
+		return (struct pwm_regs *)PWM7_BASE_ADDR;
+	case 7:
+		return (struct pwm_regs *)PWM8_BASE_ADDR;
+#endif
 	default:
 		printf("unknown pwm_id: %d\n", pwm_id);
 		break;