common.c: fix define - use Gx Base for Gx defines
avoid some potential issues later.
// Flash registers common to STM32G0 and STM32G4 series.
#define STM32Gx_FLASH_REGS_ADDR ((uint32_t)0x40022000)
-#define STM32Gx_FLASH_ACR (STM32G0_FLASH_REGS_ADDR + 0x00)
-#define STM32Gx_FLASH_KEYR (STM32G0_FLASH_REGS_ADDR + 0x08)
-#define STM32Gx_FLASH_OPTKEYR (STM32G0_FLASH_REGS_ADDR + 0x0c)
-#define STM32Gx_FLASH_SR (STM32G0_FLASH_REGS_ADDR + 0x10)
-#define STM32Gx_FLASH_CR (STM32G0_FLASH_REGS_ADDR + 0x14)
-#define STM32Gx_FLASH_ECCR (STM32G0_FLASH_REGS_ADDR + 0x18)
-#define STM32Gx_FLASH_OPTR (STM32G0_FLASH_REGS_ADDR + 0x20)
+#define STM32Gx_FLASH_ACR (STM32Gx_FLASH_REGS_ADDR + 0x00)
+#define STM32Gx_FLASH_KEYR (STM32Gx_FLASH_REGS_ADDR + 0x08)
+#define STM32Gx_FLASH_OPTKEYR (STM32Gx_FLASH_REGS_ADDR + 0x0c)
+#define STM32Gx_FLASH_SR (STM32Gx_FLASH_REGS_ADDR + 0x10)
+#define STM32Gx_FLASH_CR (STM32Gx_FLASH_REGS_ADDR + 0x14)
+#define STM32Gx_FLASH_ECCR (STM32Gx_FLASH_REGS_ADDR + 0x18)
+#define STM32Gx_FLASH_OPTR (STM32Gx_FLASH_REGS_ADDR + 0x20)
// G0 (RM0444 Table 1, sec 3.7)
// Mostly the same as G4 chips, but the notation
