bdl: minerva: add deinit function

Removes dependency to Nyx storage for hw init too.

bdk/mem/minerva.h

@@ -67,6 +67,7 @@ typedef enum
 
 extern void (*minerva_cfg)(mtc_config_t *mtc_cfg, void *);
 u32  minerva_init(minerva_str_t *mtc_str);
+void minerva_deinit();
 void minerva_change_freq(minerva_freq_t freq);
 void minerva_sdmmc_la_program(void *table, bool t210b01);
 void minerva_prep_boot_freq();