add dual bank flash configuration info to chipid database.

add a 'has_dual_bank' info to flash param, helping handling a couple of cases
 - selecting over dual bank specific code path without handling multiple chip id all over the code.
 - handling dual bank mode dynamic configuration

include/stlink.h

@@ -159,6 +159,8 @@ typedef struct flash_loader {
         int serial_size;
 
         enum stlink_flash_type flash_type;	// stlink_chipid_params.flash_type, set by stlink_load_device_params(), values: STLINK_FLASH_TYPE_xxx
+        bool has_dual_bank;
+
         stm32_addr_t flash_base;	// STM32_FLASH_BASE, set by stlink_load_device_params()
         size_t flash_size;	// calculated by stlink_load_device_params()
         size_t flash_pgsz;	// stlink_chipid_params.flash_pagesize, set by stlink_load_device_params()

include/stlink/chipid.h

@@ -73,6 +73,7 @@ struct stlink_chipid_params {
 	uint32_t chip_id;
 	char *description;
 	enum stlink_flash_type flash_type;
+	bool has_dual_bank;
 	uint32_t flash_size_reg;
 	uint32_t flash_pagesize;
 	uint32_t sram_size;

src/common.c

@@ -885,7 +885,9 @@ int stlink_load_device_params(stlink_t *sl) {
     } else {
         sl->flash_size = flash_size * 1024;
     }
+
     sl->flash_type = params->flash_type;
+    sl->has_dual_bank = params->has_dual_bank;
     sl->flash_pgsz = params->flash_pagesize;
     sl->sram_size = params->sram_size;
     sl->sys_base = params->bootrom_base;