Get rid of the double FatFs

loader/Makefile

@@ -18,7 +18,7 @@ dir_build := build
 
 ASFLAGS := -mcpu=arm946e-s
 CFLAGS  := -Wall -Wextra -MMD -MP -mthumb -mthumb-interwork $(ASFLAGS) -fno-builtin -std=c11 -Wno-main -O2 -flto -ffast-math
-LDFLAGS := -nostartfiles
+LDFLAGS := -nostdlib
 
 objects = $(patsubst $(dir_source)/%.s, $(dir_build)/%.o, \
           $(patsubst $(dir_source)/%.c, $(dir_build)/%.o, \
@@ -37,6 +37,8 @@ $(name).bin: $(dir_build)/$(name).elf
 $(dir_build)/$(name).elf: $(objects)
 	$(LINK.o) -T linker.ld $(OUTPUT_OPTION) $^
 
+$(dir_build)/memory.o: CFLAGS += -O3
+
 $(dir_build)/%.o: $(dir_source)/%.c
 	@mkdir -p "$(@D)"
 	$(COMPILE.c) $(OUTPUT_OPTION) $<