According to the Reference Manual the 'wb_per_at_lpm' field of register
CCM_CLPCR corresponds to bit 16 so fix its definition accordingly.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
 #define MXC_CCM_CLPCR_BYP_MMDC_CH0_LPM_HS              (1 << 19)
 #define MXC_CCM_CLPCR_WB_CORE_AT_LPM                   (1 << 17)
 #endif
-#define MXC_CCM_CLPCR_WB_PER_AT_LPM                    (1 << 17)
+#define MXC_CCM_CLPCR_WB_PER_AT_LPM                    (1 << 16)
 #define MXC_CCM_CLPCR_COSC_PWRDOWN                     (1 << 11)
 #define MXC_CCM_CLPCR_STBY_COUNT_MASK                  (0x3 << 9)
 #define MXC_CCM_CLPCR_STBY_COUNT_OFFSET                        9