mxs: clock: Use 'mxs' prefix for methods

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/board/freescale/mx28evk/mx28evk.c b/board/freescale/mx28evk/mx28evk.c
index 6e719ff..ad66f29 100644
--- a/board/freescale/mx28evk/mx28evk.c
+++ b/board/freescale/mx28evk/mx28evk.c
@@ -43,14 +43,14 @@
 int board_early_init_f(void)
 {
 	/* IO0 clock at 480MHz */
-	mx28_set_ioclk(MXC_IOCLK0, 480000);
+	mxs_set_ioclk(MXC_IOCLK0, 480000);
 	/* IO1 clock at 480MHz */
-	mx28_set_ioclk(MXC_IOCLK1, 480000);
+	mxs_set_ioclk(MXC_IOCLK1, 480000);
 
 	/* SSP0 clock at 96MHz */
-	mx28_set_sspclk(MXC_SSPCLK0, 96000, 0);
+	mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
 	/* SSP2 clock at 160MHz */
-	mx28_set_sspclk(MXC_SSPCLK2, 160000, 0);
+	mxs_set_sspclk(MXC_SSPCLK2, 160000, 0);
 
 #ifdef	CONFIG_CMD_USB
 	mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT);