rename fake to C6, which is the most likely ID

Author: arpruss

STM32F1/boards.txt

@@ -434,7 +434,7 @@ genericSTM32F103C.menu.opt.ogstd.build.flags.ldspecs=
 
 ###################### Generic STM32F103C6 ########################################
 
-genericSTM32F103C6.name=Generic STM32F103C6 / fake STM32F103C8
+genericSTM32F103C6.name=Generic STM32F103C6/fake STM32F103C8
 genericSTM32F103C6.vid.0=0x1EAF
 genericSTM32F103C6.pid.0=0x0004
 genericSTM32F103C6.build.variant=generic_stm32f103c
@@ -448,7 +448,7 @@ genericSTM32F103C6.upload.file_type=bin
 genericSTM32F103C6.upload.auto_reset=true
 genericSTM32F103C6.upload.tool=maple_upload
 genericSTM32F103C6.upload.protocol=maple_dfu
-genericSTM32F103C6.build.cpu_flags=-DMCU_STM32F103C8
+genericSTM32F103C6.build.cpu_flags=-DMCU_STM32F103C6
 genericSTM32F103C6.build.ldscript=ld/jtag_c6.ld
 genericSTM32F103C6.upload.maximum_size=32768
 genericSTM32F103C6.upload.maximum_data_size=10240

STM32F1/system/libmaple/stm32f1/include/series/stm32.h

@@ -89,6 +89,13 @@ extern "C" {
 #   define STM32_F1_LINE                STM32_F1_LINE_PERFORMANCE
 #   define STM32_MEDIUM_DENSITY
 
+#elif defined(MCU_STM32F103C6)
+#   define STM32_NR_GPIO_PORTS          3
+#   define STM32_SRAM_END               ((void*)0x20002800)
+#   define NR_GPIO_PORTS                STM32_NR_GPIO_PORTS
+#   define STM32_F1_LINE                STM32_F1_LINE_PERFORMANCE
+#   define STM32_MEDIUM_DENSITY // this is actually a low density device, but it is very close to the C8
+
 #elif defined(MCU_STM32F103CB)
 #   define STM32_F1_LINE                STM32_F1_LINE_PERFORMANCE
     /* This STM32_NR_GPIO_PORTS is not true, but only pins 0 and