gpio clock init simplification

Minor cleanup of gpio init:  since the gpio code enables its clock,
the PSC code doesn't need to do that too.  And when enabling that
clock triggers an error, report it in the standard way.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/gpio.c

@@ -287,7 +287,7 @@ static int __init davinci_gpio_irq_setup(void)
 	if (IS_ERR(clk)) {
 		printk(KERN_ERR "Error %ld getting gpio clock?\n",
 		       PTR_ERR(clk));
-		return 0;
+		return PTR_ERR(clk);
 	}
 	clk_enable(clk);
 

arch/arm/mach-davinci/psc.c

@@ -213,8 +213,6 @@ void __init davinci_psc_init(void)
 					DAVINCI_LPSC_TPTC0, 1);
 		davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN,
 					DAVINCI_LPSC_TPTC1, 1);
-		davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN,
-					DAVINCI_LPSC_GPIO, 1);
 
 		/* Turn on WatchDog timer LPSC.	 Needed for RESET to work */
 		davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN,
@@ -222,7 +220,5 @@ void __init davinci_psc_init(void)
 	} else if (cpu_is_davinci_dm646x()) {
 		davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN,
 					DM646X_LPSC_AEMIF, 1);
-		davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN,
-					DM646X_LPSC_GPIO, 1);
 	}
 }