stm32/boards/NUCLEO_F091RC: Enable LFS1 filesystem.

And disable some less common features to make space for it.

Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>

ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.h

@@ -4,17 +4,21 @@
 #define MICROPY_EMIT_THUMB          (0)
 #define MICROPY_EMIT_INLINE_THUMB   (0)
 #define MICROPY_OPT_COMPUTED_GOTO   (0)
+#define MICROPY_PY_BUILTINS_COMPLEX (0)
 #define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_USOCKET          (0)
 #define MICROPY_PY_NETWORK          (0)
 #define MICROPY_PY_STM              (0)
 #define MICROPY_PY_PYB_LEGACY       (0)
+#define MICROPY_PY_UHEAPQ           (0)
+#define MICROPY_PY_UTIMEQ           (0)
+#define MICROPY_PY_FRAMEBUF         (0)
 
-#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (0)
 #define MICROPY_HW_ENABLE_RTC       (1)
 #define MICROPY_HW_ENABLE_ADC       (1)
 #define MICROPY_HW_ENABLE_DAC       (1)
 #define MICROPY_HW_HAS_SWITCH       (1)
+#define MICROPY_HW_HAS_FLASH        (1)
 
 // For system clock, enable one source:
 // #define MICROPY_HW_CLK_USE_HSI      (1) // internal 8MHz -> PLL = 48MHz.

ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.mk

@@ -5,6 +5,7 @@ LD_FILES = boards/stm32f091xc.ld boards/common_basic.ld
 
 # MicroPython settings
 MICROPY_VFS_FAT = 0
+MICROPY_VFS_LFS1 ?= 1
 
 # Don't include default frozen modules because MCU is tight on flash space
 FROZEN_MANIFEST ?=