arch, board: squash lines for immediate return

Remove unneeded variables and assignments.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
Reviewed-by: Angelo Dureghello <angelo@sysam.it>
diff --git a/board/ti/omap5_uevm/evm.c b/board/ti/omap5_uevm/evm.c
index 50da410..b5d5ba9 100644
--- a/board/ti/omap5_uevm/evm.c
+++ b/board/ti/omap5_uevm/evm.c
@@ -245,10 +245,7 @@
 
 int ehci_hcd_stop(void)
 {
-	int ret;
-
-	ret = omap_ehci_hcd_stop();
-	return ret;
+	return omap_ehci_hcd_stop();
 }
 
 void usb_hub_reset_devices(int port)