ARM: mxs: rename function that sets AUTO_RESTART flag

The AUTO_RESTART flag of HW_RTC_PERSISTENT0 register will
power up the chip automatically 180ms after power down.
This bit must be enabled by the boot loader to ensure the
target can start upon hardware reset or watchdog reset
even when powered from a battery.

Currently the function named 'mxs_power_clear_auto_restart()'
is setting this flag although the 'clear' in its name suggest
the opposite.

This patch renames the function to 'mxs_power_set_auto_restart()'
and removes the comment about EVK revision A which was confusing
because the function indeed was setting the flag.

Signed-off-by: Hector Palacios <hector.palacios@digi.com>

arch/arm/cpu/arm926ejs/mxs/spl_power_init.c

@@ -36,7 +36,7 @@ static void mxs_power_clock2pll(void)
 			CLKCTRL_CLKSEQ_BYPASS_CPU);
 }
 
-static void mxs_power_clear_auto_restart(void)
+static void mxs_power_set_auto_restart(void)
 {
 	struct mxs_rtc_regs *rtc_regs =
 		(struct mxs_rtc_regs *)MXS_RTC_BASE;
@@ -49,10 +49,7 @@ static void mxs_power_clear_auto_restart(void)
 	while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_CLKGATE)
 		;
 
-	/*
-	 * Due to the hardware design bug of mx28 EVK-A
-	 * we need to set the AUTO_RESTART bit.
-	 */
+	/* Do nothing if flag already set */
 	if (readl(&rtc_regs->hw_rtc_persistent0) & RTC_PERSISTENT0_AUTO_RESTART)
 		return;
 
@@ -911,7 +908,7 @@ void mxs_power_init(void)
 	mxs_ungate_power();
 
 	mxs_power_clock2xtal();
-	mxs_power_clear_auto_restart();
+	mxs_power_set_auto_restart();
 	mxs_power_set_linreg();
 	mxs_power_setup_5v_detect();