Fix broken ADC init in SDK.

This reverts part of ffce77e1.

lib/sdk/Libraries/CMSIS/Device/Maxim/MAX32665/Include/adc_regs.h

@@ -122,6 +122,9 @@ typedef struct {
  #define MXC_F_ADC_CTRL_REFBUF_PWR_POS                  3 /**< CTRL_REFBUF_PWR Position */
  #define MXC_F_ADC_CTRL_REFBUF_PWR                      ((uint32_t)(0x1UL << MXC_F_ADC_CTRL_REFBUF_PWR_POS)) /**< CTRL_REFBUF_PWR Mask */
 
+#define MXC_F_ADC_CTRL_CHGPUMP_PWR_POS                 4 /**< CTRL_CHGPUMP_PWR Position */
+#define MXC_F_ADC_CTRL_CHGPUMP_PWR                     ((uint32_t)(0x1UL << MXC_F_ADC_CTRL_CHGPUMP_PWR_POS)) /**< CTRL_CHGPUMP_PWR Mask */
+
  #define MXC_F_ADC_CTRL_REF_SEL_POS                     4 /**< CTRL_REF_SEL Position */
  #define MXC_F_ADC_CTRL_REF_SEL                         ((uint32_t)(0x1UL << MXC_F_ADC_CTRL_REF_SEL_POS)) /**< CTRL_REF_SEL Mask */
 

lib/sdk/Libraries/MAX32665PeriphDriver/Source/adc.c

@@ -118,6 +118,7 @@ int ADC_Init(unsigned divisor, const sys_cfg_adc_t* sys_cfg)
     // Power up the ADC
     MXC_ADC->ctrl |= MXC_F_ADC_CTRL_PWR;
     MXC_ADC->ctrl |= MXC_F_ADC_CTRL_REFBUF_PWR;
+    MXC_ADC->ctrl |= MXC_F_ADC_CTRL_CHGPUMP_PWR;
     
     while ((MXC_ADC->intr & MXC_F_ADC_INTR_REF_READY_IF)>>MXC_F_ADC_INTR_REF_READY_IF_POS);
     ADC_ClearFlags(MXC_F_ADC_INTR_REF_READY_IF);