mpc512x: fix System Clock Control constants for USB1 & USB2

Signer-off-by: Martha Stan <mmarx@silicontkx.com>

include/asm-ppc/immap_512x.h

@@ -215,8 +215,8 @@ typedef struct clk512x {
 #define CLOCK_SCCR2_DIU_EN		0x80000000
 #define CLOCK_SCCR2_AXE_EN		0x40000000
 #define CLOCK_SCCR2_MEM_EN		0x20000000
-#define CLOCK_SCCR2_USB2_EN		0x10000000
-#define CLOCK_SCCR2_USB1_EN		0x08000000
+#define CLOCK_SCCR2_USB1_EN		0x10000000
+#define CLOCK_SCCR2_USB2_EN		0x08000000
 #define CLOCK_SCCR2_I2C_EN		0x04000000
 #define CLOCK_SCCR2_BDLC_EN		0x02000000
 #define CLOCK_SCCR2_SDHC_EN		0x01000000