mxs: Rename CONFIG_SPL_MX28_PSWITCH_WAIT to CONFIG_SPL_MXS_PSWITCH_WAIT

The power switch option is compatible with i.MX23 and i.MX28 so the
configration option needs to reflect it. We choose
'CONFIG_SPL_MXS_PSWITCH_WAIT' for the option name.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/cpu/arm926ejs/mxs/mxs_init.h b/arch/arm/cpu/arm926ejs/mxs/mxs_init.h
index 2ddc5bc..084def5 100644
--- a/arch/arm/cpu/arm926ejs/mxs/mxs_init.h
+++ b/arch/arm/cpu/arm926ejs/mxs/mxs_init.h
@@ -30,7 +30,7 @@
 
 void mxs_power_init(void);
 
-#ifdef	CONFIG_SPL_MX28_PSWITCH_WAIT
+#ifdef	CONFIG_SPL_MXS_PSWITCH_WAIT
 void mxs_power_wait_pswitch(void);
 #else
 static inline void mxs_power_wait_pswitch(void) { }
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
index e9d6302..287c698 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
@@ -921,7 +921,7 @@
 	early_delay(1000);
 }
 
-#ifdef	CONFIG_SPL_MX28_PSWITCH_WAIT
+#ifdef	CONFIG_SPL_MXS_PSWITCH_WAIT
 void mxs_power_wait_pswitch(void)
 {
 	struct mxs_power_regs *power_regs =