The SCK pins where missing in usarts pinctrl.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
                                                atmel,pins =
                                                        <0 3 0x1 0x0>;  /* PA3 periph A */
                                        };
+
+                                       pinctrl_usart0_sck: usart0_sck-0 {
+                                               atmel,pins =
+                                                       <0 4 0x1 0x0>;  /* PA4 periph A */
+                                       };
                                };
 
                                usart1 {
                                                atmel,pins =
                                                        <2 28 0x3 0x0>; /* PC28 periph C */
                                        };
+
+                                       pinctrl_usart1_sck: usart1_sck-0 {
+                                               atmel,pins =
+                                                       <2 28 0x3 0x0>; /* PC29 periph C */
+                                       };
                                };
 
                                usart2 {
                                                atmel,pins =
                                                        <1 1 0x2 0x0>;  /* PB1 periph B */
                                        };
+
+                                       pinctrl_usart2_sck: usart2_sck-0 {
+                                               atmel,pins =
+                                                       <1 2 0x2 0x0>;  /* PB2 periph B */
+                                       };
                                };
 
                                usart3 {
                                                atmel,pins =
                                                        <2 25 0x2 0x0>; /* PC25 periph B */
                                        };
+
+                                       pinctrl_usart3_sck: usart3_sck-0 {
+                                               atmel,pins =
+                                                       <2 26 0x2 0x0>; /* PC26 periph B */
+                                       };
                                };
 
                                uart0 {