Monahans: avoid floating point calculations

Current code for the Monahans CPU defined OSCR_CLK_FREQ as 3.250 (MHz)
which caused floating point operations to be used. This resulted in
unresolved references to some FP related libgcc functions when using
U-Boot's private libgcc functions.

Change the code to use fixed point math only.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/delta/nand.c b/board/delta/nand.c
index e87d502..85a6ba2 100644
--- a/board/delta/nand.c
+++ b/board/delta/nand.c
@@ -193,7 +193,7 @@
 static void wait_us(unsigned long us)
 {
 	unsigned long start = OSCR;
-	us *= OSCR_CLK_FREQ;
+	us = DIV_ROUND_UP(us * OSCR_CLK_FREQ, 1000);
 
 	while (get_delta(start) < us) {
 		/* do nothing */
@@ -214,9 +214,11 @@
 	if(!event)
 		return 0xff000000;
 	else if(event & (NDSR_CS0_CMDD | NDSR_CS0_BBD))
-		timeout = CONFIG_SYS_NAND_PROG_ERASE_TO * OSCR_CLK_FREQ;
+		timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_PROG_ERASE_TO
+					* OSCR_CLK_FREQ, 1000);
 	else
-		timeout = CONFIG_SYS_NAND_OTHER_TO * OSCR_CLK_FREQ;
+		timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_OTHER_TO
+					* OSCR_CLK_FREQ, 1000);
 
 	while(1) {
 		ndsr = NDSR;