stv0991: configure clock & pad muxing for qspi

stv0991 has cadence qspi controller for flash interfacing, this
patch configures the device pads & clock for the controller.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Jagannadh Teki <jteki@openedev.com>
diff --git a/arch/arm/cpu/armv7/stv0991/pinmux.c b/arch/arm/cpu/armv7/stv0991/pinmux.c
index 1d086a2..24c67fa 100644
--- a/arch/arm/cpu/armv7/stv0991/pinmux.c
+++ b/arch/arm/cpu/armv7/stv0991/pinmux.c
@@ -55,6 +55,11 @@
 				ETH_M_VDD_CFG, &stv0991_creg->vdd_pad1);
 
 		break;
+	case QSPI_CS_CLK_PAD:
+		writel((readl(&stv0991_creg->mux13) & FLASH_CS_NC_MASK) |
+				CFG_FLASH_CS_NC, &stv0991_creg->mux13);
+		writel((readl(&stv0991_creg->mux13) & FLASH_CLK_MASK) |
+				CFG_FLASH_CLK, &stv0991_creg->mux13);
 	default:
 		break;
 	}