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/cpu/arm920t/imx/timer.c b/arch/arm/cpu/arm920t/imx/timer.c
index b62558f..178422a 100644
--- a/arch/arm/cpu/arm920t/imx/timer.c
+++ b/arch/arm/cpu/arm920t/imx/timer.c
@@ -78,11 +78,7 @@
  */
 ulong get_tbclk (void)
 {
-	ulong tbclk;
-
-	tbclk = CONFIG_SYS_HZ;
-
-	return tbclk;
+	return CONFIG_SYS_HZ;
 }
 
 /*
diff --git a/arch/arm/cpu/armv7/am33xx/sys_info.c b/arch/arm/cpu/armv7/am33xx/sys_info.c
index 52a6824..f42eee1 100644
--- a/arch/arm/cpu/armv7/am33xx/sys_info.c
+++ b/arch/arm/cpu/armv7/am33xx/sys_info.c
@@ -65,9 +65,7 @@
  */
 u32 get_sysboot_value(void)
 {
-	int mode;
-	mode = readl(&cstat->statusreg) & (SYSBOOT_MASK);
-	return mode;
+	return readl(&cstat->statusreg) & SYSBOOT_MASK;
 }
 
 #ifdef CONFIG_DISPLAY_CPUINFO
diff --git a/arch/arm/cpu/sa1100/timer.c b/arch/arm/cpu/sa1100/timer.c
index 0a0006b..90e2128 100644
--- a/arch/arm/cpu/sa1100/timer.c
+++ b/arch/arm/cpu/sa1100/timer.c
@@ -66,8 +66,5 @@
  */
 ulong get_tbclk (void)
 {
-	ulong tbclk;
-
-	tbclk = CONFIG_SYS_HZ;
-	return tbclk;
+	return CONFIG_SYS_HZ;
 }
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)