omap: am335x_evm: enable i2c1 channel

This patch sets up pinmux, enables fclk, and
defines CONFIG_I2C_MULTI_BUS

Signed-off-by: Steve Sakoman <steve@sakoman.com>
diff --git a/board/ti/am335x/mux.c b/board/ti/am335x/mux.c
index 9ccb436..c696c0f 100644
--- a/board/ti/am335x/mux.c
+++ b/board/ti/am335x/mux.c
@@ -280,6 +280,14 @@
 	{-1},
 };
 
+static struct module_pin_mux i2c1_pin_mux[] = {
+	{OFFSET(spi0_d1), (MODE(2) | RXACTIVE |
+			PULLUDEN | SLEWCTRL)},	/* I2C_DATA */
+	{OFFSET(spi0_cs0), (MODE(2) | RXACTIVE |
+			PULLUDEN | SLEWCTRL)},	/* I2C_SCLK */
+	{-1},
+};
+
 /*
  * Configure the pin mux for the module
  */
@@ -310,3 +318,8 @@
 {
 	configure_module_pin_mux(i2c0_pin_mux);
 }
+
+void enable_i2c1_pin_mux(void)
+{
+	configure_module_pin_mux(i2c1_pin_mux);
+}