refactor(pmu): move PMU calibration efuse getters from efuse_ll.h to pmu_ll.h

Move the PMU internal voltage calibration related efuse read LL
functions
from efuse_ll.h into pmu_ll.h, renaming them with the pmu_ll prefix.
efuse_ll.h should only contain efuse controller or system-global
functions;
other modules' private efuse bits belong to their own LL layer.

Affected chips: esp32c5, esp32c6, esp32c61, esp32h2, esp32h4, esp32p4.

Moved functions (renamed efuse_ll_get_* -> pmu_ll_get_*):
- get_active_hp_dbias, get_active_lp_dbias
- get_dbias_vol_gap
- get_lslp_dbg, get_dslp_dbg (where present)
- get_lslp_hp_dbias, get_dslp_lp_dbias (where present)
- get_dslp_dbias (esp32h2)

components/esp_hal_pmu/esp32c5/include/hal/pmu_ll.h

@@ -16,11 +16,47 @@
 #include "soc/pmu_struct.h"
 #include "hal/pmu_types.h"
 #include "hal/misc.h"
+#include "soc/efuse_struct.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_active_hp_dbias(void)
+{
+    return EFUSE.rd_mac_sys3.active_hp_dbias;
+}
+
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_active_lp_dbias(void)
+{
+    return EFUSE.rd_mac_sys3.active_lp_dbias;
+}
+
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_lslp_dbg(void)
+{
+    return EFUSE.rd_mac_sys3.lslp_hp_dbg;
+}
+
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_lslp_hp_dbias(void)
+{
+    return EFUSE.rd_mac_sys3.lslp_hp_dbias;
+}
+
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_dslp_dbg(void)
+{
+    return EFUSE.rd_mac_sys3.dslp_lp_dbg;
+}
+
+__attribute__((always_inline)) static inline uint32_t pmu_ll_get_dslp_lp_dbias(void)
+{
+    return (EFUSE.rd_mac_sys4.dslp_lp_dbias_1 << 4) | EFUSE.rd_mac_sys3.dslp_lp_dbias;
+}
+
+__attribute__((always_inline)) static inline int32_t pmu_ll_get_dbias_vol_gap(void)
+{
+    return EFUSE.rd_mac_sys4.lp_hp_dbias_vol_gap;
+}
+
 /**
  * @brief Set the power domain that needs to be powered down in the digital power
  *