Renamed mx28_register to mx28_register_32 to prepare for mx28_register_8

This patch renames mx28_register to mx28_register_32 in order to
prepare for the introduction of an 8-bit register, mx28_register_8.

Signed-off-by: Robert Delien <robert@delien.nl>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/cpu/arm926ejs/mx28/clock.c b/arch/arm/cpu/arm926ejs/mx28/clock.c
index f698506..9d3a018 100644
--- a/arch/arm/cpu/arm926ejs/mx28/clock.c
+++ b/arch/arm/cpu/arm926ejs/mx28/clock.c
@@ -223,7 +223,7 @@
 		return;
 
 	clkreg = (uint32_t)(&clkctrl_regs->hw_clkctrl_ssp0) +
-			(ssp * sizeof(struct mx28_register));
+			(ssp * sizeof(struct mx28_register_32));
 
 	clrbits_le32(clkreg, CLKCTRL_SSP_CLKGATE);
 	while (readl(clkreg) & CLKCTRL_SSP_CLKGATE)
@@ -272,7 +272,7 @@
 		return XTAL_FREQ_KHZ;
 
 	clkreg = (uint32_t)(&clkctrl_regs->hw_clkctrl_ssp0) +
-			(ssp * sizeof(struct mx28_register));
+			(ssp * sizeof(struct mx28_register_32));
 
 	tmp = readl(clkreg) & CLKCTRL_SSP_DIV_MASK;