i.MX7ULP: Fix PCC register bits mask and offset issue

The offset for FRAC and the mask for PCD are not correct.
If we set FRAC, we can't get the right frequency. Fix them
to correct value.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/include/asm/arch-mx7ulp/pcc.h b/arch/arm/include/asm/arch-mx7ulp/pcc.h
index 67a0936..dee3cfc 100644
--- a/arch/arm/include/asm/arch-mx7ulp/pcc.h
+++ b/arch/arm/include/asm/arch-mx7ulp/pcc.h
@@ -289,10 +289,10 @@
 #define PCC_INUSE_MASK		(0x1 << PCC_INUSE_OFFSET)
 #define PCC_PCS_OFFSET	24
 #define PCC_PCS_MASK	(0x7 << PCC_PCS_OFFSET)
-#define PCC_FRAC_OFFSET	4
+#define PCC_FRAC_OFFSET	3
 #define PCC_FRAC_MASK	(0x1 << PCC_FRAC_OFFSET)
 #define PCC_PCD_OFFSET	0
-#define PCC_PCD_MASK	(0xf << PCC_PCD_OFFSET)
+#define PCC_PCD_MASK	(0x7 << PCC_PCD_OFFSET)
 
 
 enum pcc_clksrc_type {