EXYNOS: Fix USB compiler warning

Fixed the compiler warning message.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/cpu/armv7/exynos/system.c b/arch/arm/cpu/armv7/exynos/system.c
index cc6ee03..4426611 100644
--- a/arch/arm/cpu/armv7/exynos/system.c
+++ b/arch/arm/cpu/armv7/exynos/system.c
@@ -29,7 +29,6 @@
 {
 	struct exynos5_sysreg *sysreg =
 		(struct exynos5_sysreg *)samsung_get_base_sysreg();
-	unsigned int phy_cfg;
 
 	/* Setting USB20PHY_CONFIG register to USB 2.0 HOST link */
 	if (mode == USB20_PHY_CFG_HOST_LINK_EN) {