mx31: Fix PDR0_CSI_PODF

The CSI PODF bit-field used by the previous code for the i.MX31 CCM PDR0
register is actually composed of two bit-fields: one pre-divider and one
post-divider. This patch fixes the CCM access macros and the code using them
accordingly.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/board/freescale/mx31ads/lowlevel_init.S b/board/freescale/mx31ads/lowlevel_init.S
index 5c18bc1..2972065 100644
--- a/board/freescale/mx31ads/lowlevel_init.S
+++ b/board/freescale/mx31ads/lowlevel_init.S
@@ -246,8 +246,8 @@
 	/* COSR */
 	str	r1, [r0, #0x1c]
 
-	/* RedBoot sets 0x1ff, 7, 3, 5, 1, 3, 0 */
-/*	REG	CCM_PDR0, PDR0_CSI_PODF(0x1ff) | PDR0_PER_PODF(7) | PDR0_HSP_PODF(2) | PDR0_NFC_PODF(6) | PDR0_IPG_PODF(1) | PDR0_MAX_PODF(2) | PDR0_MCU_PODF(0)*/
+	/* RedBoot sets 0x3f, 7, 7, 3, 5, 1, 3, 0 */
+/*	REG	CCM_PDR0, PDR0_CSI_PODF(0x3f) | PDR0_CSI_PRDF(7) | PDR0_PER_PODF(7) | PDR0_HSP_PODF(2) | PDR0_NFC_PODF(6) | PDR0_IPG_PODF(1) | PDR0_MAX_PODF(2) | PDR0_MCU_PODF(0)*/
 
 	/* Redboot: 0, 51, 10, 12 / 0, 14, 9, 13 */
 /*	REG	CCM_MPCTL, PLL_PD(0) | PLL_MFD(0x33) | PLL_MFI(7) | PLL_MFN(0x23)*/