stv0991: enable ethernet support

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
diff --git a/arch/arm/cpu/armv7/stv0991/pinmux.c b/arch/arm/cpu/armv7/stv0991/pinmux.c
index 6d4414a..1d086a2 100644
--- a/arch/arm/cpu/armv7/stv0991/pinmux.c
+++ b/arch/arm/cpu/armv7/stv0991/pinmux.c
@@ -41,6 +41,20 @@
 				CFG_GPIOB_16_UART_TX,
 				&stv0991_creg->mux7);
 		break;
+	case ETH_GPIOB_10_31_C_0_4:
+		writel(readl(&stv0991_creg->mux6) & 0x000000FF,
+				&stv0991_creg->mux6);
+		writel(0x00000000, &stv0991_creg->mux7);
+		writel(0x00000000, &stv0991_creg->mux8);
+		writel(readl(&stv0991_creg->mux9) & 0xFFF00000,
+				&stv0991_creg->mux9);
+		/* Ethernet Voltage configuration to 1.8V*/
+		writel((readl(&stv0991_creg->vdd_pad1) & VDD_ETH_PS_MASK) |
+				ETH_VDD_CFG, &stv0991_creg->vdd_pad1);
+		writel((readl(&stv0991_creg->vdd_pad1) & VDD_ETH_PS_MASK) |
+				ETH_M_VDD_CFG, &stv0991_creg->vdd_pad1);
+
+		break;
 	default:
 		break;
 	}