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/arch/arm/mach-zynq/cpu.c b/arch/arm/mach-zynq/cpu.c
index 914b1fe..ba9171e 100644
--- a/arch/arm/mach-zynq/cpu.c
+++ b/arch/arm/mach-zynq/cpu.c
@@ -43,12 +43,8 @@
 
 unsigned int zynq_get_silicon_version(void)
 {
-	unsigned int ver;
-
-	ver = (readl(&devcfg_base->mctrl) &
-	       ZYNQ_SILICON_VER_MASK) >> ZYNQ_SILICON_VER_SHIFT;
-
-	return ver;
+	return (readl(&devcfg_base->mctrl) & ZYNQ_SILICON_VER_MASK)
+						>> ZYNQ_SILICON_VER_SHIFT;
 }
 
 void reset_cpu(ulong addr)