[ARM] omap: fix a pile of issues

This patch fixes a number of sillies, from missing 'const' to using
'return' in void functions, to functions with no arguments not even
'void' and a cast which isn't required.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 9f9a921..dcd9d16 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -255,7 +255,7 @@
 	if (!_omap_sram_reprogram_clock)
 		omap_sram_error();
 
-	return _omap_sram_reprogram_clock(dpllctl, ckctl);
+	_omap_sram_reprogram_clock(dpllctl, ckctl);
 }
 
 int __init omap1_sram_init(void)
@@ -282,8 +282,8 @@
 	if (!_omap2_sram_ddr_init)
 		omap_sram_error();
 
-	return _omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl,
-				    base_cs, force_unlock);
+	_omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl,
+			     base_cs, force_unlock);
 }
 
 static void (*_omap2_sram_reprogram_sdrc)(u32 perf_level, u32 dll_val,
@@ -294,7 +294,7 @@
 	if (!_omap2_sram_reprogram_sdrc)
 		omap_sram_error();
 
-	return _omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type);
+	_omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type);
 }
 
 static u32 (*_omap2_set_prcm)(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass);