ppc4xx: Convert PPC4xx UIC defines from lower case to upper case

The latest PPC4xx register cleanup patch missed the UIC defines.
This patch now changes lower case UIC defines to upper case.

Signed-off-by: Stefan Roese <sr@denx.de>

board/amcc/bubinga/bubinga.c

@@ -29,12 +29,12 @@ long int spd_sdram(void);
 
 int board_early_init_f(void)
 {
-	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
-	mtdcr(uicer, 0x00000000);	/* disable all ints */
-	mtdcr(uiccr, 0x00000010);
-	mtdcr(uicpr, 0xFFFF7FF0);	/* set int polarities */
-	mtdcr(uictr, 0x00000010);	/* set int trigger levels */
-	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all ints */
+	mtdcr(UIC0CR, 0x00000010);
+	mtdcr(UIC0PR, 0xFFFF7FF0);	/* set int polarities */
+	mtdcr(UIC0TR, 0x00000010);	/* set int trigger levels */
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
 
 	/*
 	 * Configure CPC0_PCI to enable PerWE as output